JP2015161147A - Electric shutter with mechanical type evacuation-time stop device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric shutter with a mechanical type evacuation-time stop device that is adaptive to electric lifting of a shutter and also prevents a person from being caught by a shutter curtain which moving down again with its own weight when evacuating.SOLUTION: An electric shutter with a mechanical type evacuation-time stop device includes: a lock device which mechanically restricts drawing-out of return wires W1, W2 once an obstacle is detected; first detection means MS1 which outputs an obstacle detection signal on detecting the drawing-out restricted return wires W1, W2 being tensed as a shutter curtain moves down; and a delay mechanism which delays timing of gravitational re-moving-down of the shutter curtain after obstacle removal. When the obstacle is detected during the electric moving-down, a control part receives the obstacle detection signal from the first detection means MS1, and stops the shutter curtain from being electrically moved down, and the delay mechanism delays timing when the return wires W1, W2 are released from be restricted from being drawn out after the obstacle is removed.

Description

The present invention relates to an electric shutter capable of lowering its own weight by releasing a brake in a fire, and more particularly to an electric shutter with a mechanical evacuation stop device.

In the fire shutter, an automatic closing device is actuated by a signal from the disaster prevention panel in the event of a fire to release the brake, and the shutter curtain is lowered by its own weight to close the opening of the building. Further, the fire shutter can release the brake by the operation from the manual closing device regardless of the fire detection signal, and the weight can be lowered. The fire prevention shutter is provided with a so-called evacuation stop device in order to prevent an evacuee from being caught by a shutter curtain that falls under its own weight.

A mechanical evacuation stop device that mechanically stops the shutter curtain that descends due to its own weight. The automatic release device that receives a signal from the disaster prevention panel that has received a fire signal from the sensor in the event of a fire causes the brake release lever of the switch to be Release the brake to lower the weight of the shutter curtain, and when the seat plate at the bottom of the shutter curtain detects a person or an obstacle during the weight drop, release the brake release lever and brake of the switch and temporarily release the shutter. When the obstacle is removed after the shutter is temporarily stopped, the shutter curtain descends again by its own weight and closes the opening (Patent Document 1).

Fire prevention shutters include a controlled shutter that normally opens and closes the shutter by driving an opening and closing mechanism, and in the event of a fire, uses an automatic closing device to lower its weight. The mechanical evacuation stop device for such a combined shutter needs to be able to handle the electric lift of the shutter.

It is also necessary to consider preventing the shutter curtain that has been temporarily stopped by obstacle detection from being pinched again when the weight of the shutter curtain is lowered again after the obstacle is removed.
JP 2009-13647 A

  An object of the present invention is to provide an electric shutter provided with a mechanical evacuation stop device that can be used for the electric lift of the shutter and that is prevented from being caught by a shutter curtain that re-falls under its own weight during evacuation. It is.

The technical means adopted by the present invention are:
Shutter curtains,
An opening and closing machine that electrically opens and closes the shutter curtain to open and close the opening;
An automatic closing device that releases the brake by the operating mechanism in the event of a fire and lowers the shutter curtain by its own weight;
A seat plate provided at the lower end of the shutter curtain and comprising an upper seat plate and a lower seat plate that is movable relative to the upper seat plate;
A return string-like member connected to the operating mechanism and configured to be pulled out as the shutter curtain descends;
A lock device that mechanically restricts the withdrawal of the return string member by lowering the lower seat plate of the shutter curtain being hit against an obstacle and moving upward relative to the upper seat plate;
First detection means for detecting a pull of the return string-like member whose withdrawal is restricted and accompanying the descent of the shutter curtain, and outputting an obstacle detection signal to the control unit;
A delay mechanism that delays the timing of re-falling the weight of the shutter curtain after obstacle removal,
With
When the lower seat plate of the shutter curtain during electric lowering hits an obstacle, the control unit receives the obstacle detection signal from the first detection means, and stops the electric lowering of the shutter curtain,
When the lower seat plate of the shutter curtain that is falling under its own weight hits an obstacle, the brake is returned by pulling the shutter string of the return string member that is controlled to be pulled out, and the weight of the shutter curtain is lowered. Stop,
The delay mechanism includes a holding unit that holds the brake return posture of the operating mechanism in the brake return posture after removing the obstacle for a predetermined time, and the pull-out restriction of the return string member is released after the obstacle removal. Although the shutter curtain re-falls its own weight, the holding means delays the timing of re-falling its own weight by holding the brake return posture of the operating mechanism for a predetermined time.
An electric shutter with a mechanical evacuation stop device.

In this specification, the automatic closing device includes not only an automatic closing device in which a fire detection signal input unit and an operation mechanism (brake release / return mechanism) are integrated, but also a fire detection signal input unit and an operation mechanism (brake). The release / return mechanism) is physically separated, and the operating part (solenoid) and the operating mechanism (brake release / return mechanism) are mechanically connected by a wire or the like.
In one aspect, the operating mechanism is provided with second detecting means for detecting that the operating mechanism is in a brake release posture and outputting an operation confirmation signal to the control unit.
When the operation confirmation signal is input to the control unit, the control mode is changed from the electric open / close mode to the self-weight drop mode.

In one aspect, the actuating mechanism is
A first actuating body that is a brake release body biased in a first direction;
A second actuator that is biased in the first direction and moves in the second direction by pulling the return string member when an obstacle is detected;
With
When the brake is released by the automatic closing device, only the first operating body moves in the first direction and the operation confirmation signal is output,
At the time of obstacle detection at the time of falling by its own weight, the first operating body moves to the brake return position together with the second operating body moving in the second direction,
The first detection means is provided in the operating mechanism, and the first detection means detects the movement of the second operating body in the second direction and outputs an obstacle detection signal during electric lowering. .

In one aspect, the operating mechanism includes a brake release body that is biased in a brake release direction by a biasing means,
At the time of obstacle detection, the brake release body is in the brake return position,
The holding means regulates the movement of the brake release body at the brake return position after removing the obstacle, holds the brake release body at the brake return position for a predetermined time,
After removing the obstacle, the holding means holds the brake release position of the brake release body for a predetermined time, and when the holding means is released, the brake release body is instantaneously moved to the brake release position by the biasing means.
After removing the obstacle, the brake return position of the brake release body is held for a predetermined time by the holding means (the brake release lever itself remains returned), and when the holding means is released, the brake release body is moved to the biasing means. The brake release position is moved to the brake release position instantly, causing problems due to the slow release operation of the brake release lever itself, problems that the brake plate is easily worn, and depending on the type of switch, There is no problem that the brake return time may vary.
Note that the delay mechanism according to the present invention may be a mechanism that decelerates the withdrawal of the return string-like member immediately after removing the restriction of the return string-like member immediately after removing the obstacle.

The return string-like member is typically a wire, and the lock device is returned by the lower seat plate of the shutter curtain that falls by its weight released by releasing the brake hits an obstacle and moves upward relative to the upper seat plate. Returning wire drawing restricting means for mechanically restricting the drawing of the wire, and the return wire in which the drawing is restricted moves the brake release body to the brake return position to stop the descent of the shutter curtain.
In one aspect, the delay mechanism (holding means) delays the timing of releasing the return wire withdrawal restriction by the return wire withdrawal restriction release delay means,
After removal of the obstacle, after the release restriction of the return wire is delayed, the return wire can be pulled out, and the operating body is instantaneously moved to the brake release position by the brake release body.
In one aspect, the return wire pull-out restricting means is movable between a lock position for restricting the pull-out of the return wire and an unlock position allowing the pull-out of the return wire, and interlocks with the upward movement of the lower seat plate. And provided with locking means to be in the locked position,
The return wire withdrawal restriction release means delays the movement of the lock means at the lock position to the lock release position.

The position where the delay mechanism (holding means) is provided is not limited. For example, when it is provided on a seat plate, when it is provided on a wire relay part (typically located above the opening), it is directly attached to the switch. In some cases, the automatic closing device with a built-in operating mechanism is provided.
In the aspect provided in the seat plate, the holding means delays the timing of releasing the return wire withdrawal restriction by the return wire withdrawal restriction release delay means,
After removal of the obstacle, after the release restriction of the return wire is delayed, the return wire can be pulled out, and the operating body is instantaneously moved to the brake release position by the biasing means.
In the aspect provided in the wire relay portion, for example, the return wire includes a first portion on the seat plate side and a second portion on the operation portion side, and the movement of the first portion is transmitted to the second portion in the wire relay portion. The second portion is loosened at a timing delayed by a predetermined time after the pulling restriction by the return wire pulling restricting means is released by removing the obstacle and the first portion of the return wire is loosened. Then, the second portion is loosened and the operating body is instantaneously moved to the brake release position by the biasing means.
In an aspect provided in the automatic closing device, the automatic closing device includes means for restricting movement of the brake release body at the brake return position, means for releasing the restriction of the movement restricted brake release body, and timing of releasing the movement restriction. The holding means is constituted by these means, and the holding wire is delayed by a predetermined time after the pulling restriction by the returning wire pulling restricting means is released by the obstruction removal and the returning wire is loosened. The movement restriction of the brake release body is released at the timing, and the brake release body is instantaneously moved to the brake release position by the urging means.
In the embodiment (FIGS. 27 to 32) described later, the operation mechanism of the automatic closing device is
A first actuating body that is a brake release body biased in a first direction;
A second actuator that is biased in the first direction and moves in the second direction by pulling the return string member when an obstacle is detected;
With
When the brake is released by the automatic closing device, only the first operating body moves in the first direction and the operation confirmation signal is output,
At the time of obstacle detection at the time of falling by its own weight, the first operating body moves to the brake return position together with the second operating body moving in the second direction,
The first detection means is provided in the operating mechanism, and the first detection means detects movement of the second operating body in the second direction and outputs an obstacle detection signal when the electric power is lowered. ,
The delay mechanism is
A locking member (latch lever) that approaches and separates from the first operating body at the brake return position in conjunction with the movement of the second operating body;
A damping mechanism for reducing the speed at which the locking member is separated from the first operating body;
With
The locking member interlocks with the second operating body moving in the second direction, approaches the first operating body at a first speed, and locks the first operating body to hold the brake return position. And
The locking member is separated from the first operating body at a second speed that is decelerated from the first speed by the damping mechanism in conjunction with the second operating body that moves in the first direction. And
When the locking state between the locking member and the first operating body is released, the first operating body biased in the first direction instantaneously moves in the first direction to release the brake. .

In one aspect, the locking device comprises:
A winding mechanism provided on the seat plate and winding the return string member;
A lock portion that regulates the rotation of the rotating body of the winding mechanism in conjunction with the relative upward movement of the lower seat plate;
With
The delay mechanism reduces the lowering speed of the lower seat plate in the upper movement position after removing the obstacle.
The number of rotating bodies constituting the winding mechanism is not limited. For example, the number of rotating bodies may be one or two. In the latter case, the lock unit restricts rotation of one of the two rotating bodies. But you can.
In one aspect, the delay mechanism includes a slow down device as a damping mechanism, and the slow down device includes a pinion gear with a damper provided on one of an upper seat plate and a lower seat plate, and a height provided on the other. A rack gear extending in a direction, and a one-way clutch mechanism provided between the pinion gear and the rack gear,
The one-way clutch mechanism invalidates the transmission between the pinion gear and the rack gear when the lower seat plate moves relative to the upper seat plate, and when the lower seat plate moves lower relative to the upper seat plate, The transmission between the pinion gear and the rack gear is made effective.

In one aspect, the locking device comprises:
A winding mechanism provided on the seat plate and winding the return string member;
A movable lock portion for restricting rotation of the rotating body of the winding mechanism by displacing from the first posture to the second posture in conjunction with the relative upward movement of the lower seat plate;
With
The delay mechanism reduces the return speed of the movable lock portion in the second posture to the first posture after the obstacle is removed.
The number of rotating bodies constituting the winding mechanism is not limited. For example, the number of rotating bodies may be one or two. In the latter case, the lock unit restricts rotation of one of the two rotating bodies. But you can.

A mechanical evacuation stop device provided with a delay mechanism disclosed in an embodiment described later,
An operating mechanism including a brake release body that moves in the first direction to release the brake, moves in the second direction to return the brake, and is biased in the brake release direction by the first biasing means; ,
A return wire having one end connected to the operating mechanism so as to move the brake release body in the second direction;
A seat plate provided at the lower end of the shutter curtain and comprising an upper seat plate and a lower seat plate that is movable relative to the upper seat plate;
A winding mechanism provided on an upper seat plate and winding the return wire from the other end;
The lower seat plate is displaceable between a first posture that is an unlocked posture and a second posture that is a locked posture, and is biased by the second biasing means so as to take the first posture. A movable lock member that regulates the rotation of the rotating body of the winding mechanism by displacing from the first posture to the second posture in conjunction with the relative upward movement of
Provided to directly or indirectly provide resistance to displacement from the second posture to the first posture so as to reduce the speed at which the movable lock member is displaced from the second posture to the first posture; A damping mechanism (FIGS. 21-22, 23, 24-26);
With
When the lower seat plate of the shutter curtain that descends due to the release of the brake hits an obstacle and moves upward relative to the upper seat plate, the movable lock member becomes the second posture and restricts the return wire from being pulled out. When the plate moves downward by a predetermined amount relative to the lower seat plate, the return wire with the drawer regulated moves the brake release body in the second direction to return the brake so that the shutter curtain Stop descent,
When the return wire can be pulled out after removal of the obstacle, the brake release body moves in the first direction to release the brake, and the shutter curtain is lowered again. 2 The urging means cooperates with the damping mechanism to slowly displace the movable lock member in the locked posture to the first posture, thereby delaying the timing for releasing the return wire withdrawal restriction. When the return wire pulling restriction is released, the brake release body is instantaneously moved to the brake release position by the first biasing means.
In one aspect, it is displaceable between the first posture and the second posture, and when the lower seat plate moves up relative to the upper seat plate, the first posture is displaced to the second posture, A detection lever that is displaceable from the second posture to the first posture when the lower seat plate moves relative to the upper seat plate;
An interlocking mechanism that interlocks the displacement of the detection lever with the displacement of the movable lock member;
With
The damping mechanism changes the displacement of the movable lock member or the detection lever from the second posture to the first posture so as to reduce the speed at which the movable lock member is displaced from the second posture to the first posture. Provided to provide resistance.
As an arrangement aspect of the damping mechanism, an aspect provided so as to directly act on the movable lock member (so as to be slowly displaced from the second attitude to the first attitude) (for example, an end portion of the movable lock member coupled to the coupling mechanism) Or the rotation shaft of the movable lock member), the mode in which the movable lock member is slowly displaced from the second posture to the first posture by acting on the interlocking mechanism portion (see FIG. 23), the detection lever The mode (FIGS. 21 to 22 and FIGS. 24 to 26) in which the movable lock member interlocked therewith can be slowly displaced from the second posture to the first posture by acting on can be exemplified.
In one aspect, the damping mechanism is provided between the interlocking mechanism and the movable lock member so as to provide resistance to displacement of the movable lock member from the second posture to the first posture (FIG. 23).
In one aspect, as shown in FIG. 23, the damping mechanism includes a rotary damper having a pinion gear, and a rack.
The movable lock member is a rotation lock member, one end side is connected to the second urging means, and the other end side is connected to the interlocking mechanism via the rack.
The second urging means cooperates with the damping mechanism to slowly rotate the rotation lock member in the second posture to the first posture.
In one aspect, when the movable lock member is in the second posture, the detection lever is in the second posture, and the lower seat plate moves downward relative to the upper seat plate after the obstacle is removed. The urging means is configured to displace the detection lever from the second posture to the first posture in conjunction with the displacement of the movable lock member from the second posture to the first posture. And
By providing the damping mechanism so as to provide resistance to the displacement of the detection lever from the second posture to the first posture, the damping mechanism cooperates with the urging means to move to the second posture. The certain rotation lock member is slowly rotated to the first posture (FIGS. 24 to 26).
In one aspect, the damping mechanism includes a rotary damper (FIGS. 24 and 25) or a linear motion damper (FIG. 26).
In one aspect, the interlock mechanism connects the movable lock member and the detection lever so as to interlock the movement of the movable lock member and the rotation of the detection lever, and the detection lever is moved from the first position to the first position. The connecting means (typically, a wire) that moves the movable lock member to the second posture in conjunction with the second posture.
In the embodiment described later, the wire 43 is exemplified as the interlocking mechanism, but a mechanical element other than the wire (for example, a link, a cam, a gear, or the like) may be used. The interlocking mechanism may be a mechanism in which the movable lock member is displaced from the first posture to the second posture via a detection lever that is displaced in conjunction with the upward movement of the lower seat plate. The interlocking mechanism may be configured by contact.
In one aspect, the detection lever is provided between the upper seat plate and the lower seat plate, and rotates in the first direction from the first posture when the lower seat plate moves up relative to the upper seat plate. Then, if the lower seat plate is moved relative to the upper seat plate, the second posture can be rotated from the second posture to the second direction to take the first posture. It is a lever.
In one aspect, the lock device includes a rotating body that winds up the return wire from the other end side, and a rotation lock member that restricts drawing of the return wire from the rotating body,
The return wire is biased in the winding direction, and the return body can be pulled out from the rotary body along the shutter curtain surface portion by rotating the rotary body as the shutter curtain is lowered by its own weight. And
The rotation lock member is biased in the second direction so as to assume an unlocked posture, and is rotated in the first direction in conjunction with the rotation of the detection lever in the first direction. The detection lever is connected to the detection lever so as to be in a locked posture that restricts the rotation of the rotating body.
In one aspect, the lock device includes, as the rotating body, a lock drum provided with a locked portion, and a winding drum provided with means for urging the return wire in a winding direction,
The return wire is wound around the winding drum and then wound around the winding drum,
The rotation lock member includes a locking claw, and the locking claw is locked to the lock drum in a locked posture.

In the embodiments (FIGS. 16 to 20) described later, the lock mechanism includes a first rotation lever and a second rotation lever provided with a locking portion, and the second rotation lever is When the obstacle is detected, the locking portion is rotated in the first direction integrally with the first rotation lever that rotates in the first direction in conjunction with the relative upward movement of the lower seat plate. After the obstacle is removed, the second rotating lever rotates in the second direction when the first rotating lever rotates a predetermined amount in the second direction after the obstacle is removed. It is configured to move and unlocked,
The damping mechanism is provided so as to reduce a speed at which the first rotation lever rotates in the second direction, and slowly rotates the first rotation lever in the second direction after removing the obstacle. As a result, the timing for releasing the lock state is delayed.
In one aspect, the first rotation lever and the second rotation lever are urged in the second direction by the first urging means and the second urging means, respectively.
After the obstacle is removed, the second rotation lever is instantaneously moved by the second biasing means after a predetermined time has elapsed after the first rotation lever starts to rotate in the second direction by the first biasing means. The locked state is released by rotating in the second direction.
In one aspect, the lock mechanism includes a rotation restricting unit that restricts rotation of the second rotation lever in a locked state in a second direction,
The rotation restriction by the rotation restriction means is configured to be released when the first rotation lever rotates a predetermined amount in the second direction.
In one aspect, the lock mechanism includes a third rotation lever as the rotation restricting means,
The third rotation lever is a contact portion that engages with a contact portion of the second rotation lever that is in a locked state with the rotating body, and a contact portion that contacts the contact portion of the first rotation lever. A contact portion, and
When the third rotation lever rotates in conjunction with the first rotation lever rotating a predetermined amount in the second direction, the third rotation lever and the second rotation lever The locked state is released and the rotation restriction is released.
In one aspect, the contact portion of the second rotation lever, and the contact portion of at least one of the contact portion of the first rotation lever and the contact portion of the third rotation lever are: It has a rotatable surface.
In one aspect, the latching | locking part of a said 2nd rotation lever is a rotating pin rotatable around an axis.

  In the present invention, when the obstacle detection is performed during the electric descent, the electric descent is performed by detecting the displacement of the mechanical element of the mechanical evacuation stop device by the first detection means and outputting the obstacle detection signal. Stop the shutter curtain inside.

  In the present invention, when obstacle detection is performed at the time of falling of its own weight, the shutter curtain re-lowering is started from the obstacle removal by delaying the timing of releasing the restriction of the return string-like member after the obstacle removal. Can be delayed.

It is a schematic front view of the electric shutter device provided with the stop device at the time of evacuation. It is a whole front view of an electric shutter device (opening part fully closed state) provided with a stop device at the time of evacuation. It is a longitudinal cross-sectional view of FIG. It is the elements on larger scale (the side in which the switch was installed) of FIG. FIG. 4 is a partially enlarged view of FIG. 3. It is a figure similar to FIG. 5 in an opening part full open state. It is a figure which shows a relay apparatus. It is a figure explaining a manual closing device. It is a figure which shows an automatic closing device (at the time of monitoring). It is a figure which shows an automatic closing device (at the time of brake release by the fire detection signal / self-weight drop). It is a figure which shows an automatic closing device (at the time of brake release by the manual closing device / self-weight drop). It is a figure which shows an automatic closing device (at the time of the obstruction detection in normal mode). It is a figure which shows an automatic closing device (at the time of the obstruction detection in the fire mode of FIG. 10). It is a fragmentary figure which shows the lower end part of a shutter curtain. It is a figure which shows a detection lever. It is a figure which shows a locking device (normal time). It is the elements on larger scale which show a locking device (locked state). It is a figure which shows a locking device (at the time of a seat board obstruction removal), and the shutter curtain is stopping. It is a figure which shows the locking device (at the time of a seat board obstruction removal) which each lever rotated slightly in the 2nd direction from the state of FIG. 18, and the shutter curtain is stopping. It is a figure which shows a locking device (at the time of shutter curtain re-falling). It is a figure which shows 1st Embodiment (slow descent apparatus as a damping mechanism) of a delay mechanism. It is a figure which shows the state with which the gentle descending apparatus of FIG. 21 was mounted | worn to the seat plate. 2 shows a second embodiment of a delay mechanism. It is a figure which shows the 1st aspect of 3rd Embodiment (attenuation mechanism) of a delay mechanism. It is a figure which shows the 2nd aspect of 3rd Embodiment (attenuation mechanism) of a delay mechanism. It is a figure which shows the 3rd aspect of 3rd Embodiment (attenuation mechanism) of a delay mechanism. It is a figure which shows the automatic closing apparatus provided with 4th Embodiment of the delay mechanism. In the figure, A is a part for releasing the brake release lever of the switch by sliding the first operating body, and B is a mechanism for operating the first operating body with a solenoid in response to a fire detection signal from the disaster prevention panel. C indicates a brake return mechanism at the time of obstacle detection and a holding mechanism for delaying the re-lowering after the obstacle removal. It is detail drawing of a brake release part. It is operation | movement explanatory drawing at the time of the fire signal input of the automatic closure apparatus shown in FIG. It is operation | movement explanatory drawing by the manual closing apparatus of the automatic closing apparatus shown in FIG. It is operation | movement explanatory drawing at the time of the obstacle detection of the automatic closure apparatus shown in FIG. It is operation | movement explanatory drawing at the time of the obstacle return of the automatic closure apparatus shown in FIG. It is a figure which shows the operation | movement flow in the electric open / close mode of a shutter, (1) is at the time of a raise, (2) is at the time of descent | fall, (3) shows the time of an obstacle detection. It is a figure which shows the operation | movement flow of a shutter, (1) When a brake release is performed at the time of an electric lift, (2) When a brake release is performed at the time of an electric drop, (3) is an obstacle during a weight drop When a detection is performed,

[A] Overall configuration of electric shutter with mechanical evacuation stop device As shown in FIGS. 1 to 6, the shutter device includes a shutter curtain 1 that closes the opening, and a shutter curtain 1 that is positioned above the opening. A winding shaft 2 to be wound and guide rails 3 provided upright on both right and left ends of the opening are provided. The shutter curtain 1 is configured by vertically connecting a plurality of elongated slats extending in the opening width direction, and a seat plate 4 is provided at the lower end. The take-up shaft 2 is rotatably supported between left and right brackets 12 provided in a take-out shape from the housing 11. As shown in FIGS. 1 and 2, an opening / closing machine 5 is provided at a position near one side of the opening width direction above the opening. The opening / closing machine 5 is attached to the bracket 12 on one side in the opening width direction. In the illustrated embodiment, the shutter is housed in the ceiling 13, but the shutter may be housed in a shutter box (not shown) attached to the housing. At normal times, the shutter curtain 1 is electrically driven up and down by opening and closing the winding shaft 2 by the opening / closing device 5 to open and close the opening. As shown in FIGS. 2 and 6, the seat plate 4 is a long upper seat plate 40 extending in the opening width direction, and is suspended below the upper seat plate 40 so as to be movable up and down relatively with respect to the upper seat plate 40. As will be described later, the seat plate 4 is an obstacle detection means for detecting an obstacle when the shutter curtain 1 that is electrically lowered or its own weight is lowered hits the obstacle. It is one component.

The shutter device includes an automatic closing device 6 that lowers the weight of the shutter curtain 1 in the event of a fire. The automatic closing device 6 includes an operating mechanism having a brake releasing body (first operating body 60) biased in a brake releasing direction by a biasing means (coil spring 601), and releases the brake by the operating mechanism in the event of a fire. Then, the shutter curtain 1 is lowered by its own weight. A specific configuration of the automatic closing device 6 will be described in detail later.

The shutter device includes a control unit, and as will be described later, different control is performed in an electric opening / closing mode (normal mode) and a self-weight drop mode (fire mode). In the present embodiment, the control unit includes an obstacle detection control panel 7A and a shutter control panel 7B. As shown in FIGS. 1 and 4, in this embodiment, the automatic closing device 6 and the obstacle detection control panel 7A are electrically connected, and the obstacle detection control panel 7A and the shutter control panel 7B are electrically connected. The manual closing device 10 and the obstacle detection control panel 7A are electrically connected. At the time of electric lifting, an opening signal, a closing signal, and a stop signal based on an input from the manual closing device 10 are transmitted to the shutter control panel 7B via the obstacle detection control panel 7A. In the illustrated embodiment, the obstacle detection control panel 7A and the shutter control panel 7B are physically separated, but the control unit has the functions of the obstacle detection control panel 7A and the shutter control panel 7B. One control unit may be used. The control unit will be described in detail later. Moreover, the detector 6a and the disaster prevention board 6b, the disaster prevention board 6b, and the automatic closing device 6 are electrically connected to each other.

When the opening is fully opened (stored), the shutter curtain 1 is wound around the winding shaft 2 in a state where the lowering is restricted by a brake that is a component of the opening / closing device 5. When a fire occurs in this state, the fire is detected by the fire detector 6a, the automatic closing device 6 is activated by the fire detection signal from the disaster prevention panel 6b, and the brake release body (first operation body 60) is moved to the brake release position. Go to and release the brake. When the brake is released, the shutter curtain 1 descends by its own weight while being guided by the groove portion of the guide rail 3 at both ends in the width direction, and the opening is fully closed by the seat plate 4 landing. At this time, the shutter curtain 1 is lowered at a speed adjusted by the action of a speed governor (governor) built in the opening / closing device 5.

A brake release lever 50 (shown in a plan view of the brake release lever 50 in FIGS. 9 to 13) protrudes from the brake case of the opening / closing machine 5, and the brake release lever (first operating body 60) causes the brake release lever. By moving 50, the brake that restricts the rotation of the opening / closing machine 5 and the winding shaft 2 is released. In an electric shutter, a switch including a brake and a brake release lever for releasing the brake are well known. In a specific example, the brake means includes a brake plate that is slidably opposed to a switch output shaft or a rotating member that rotates integrally with the output shaft. The brake plate is pressed against by the urging means, and the brake works to restrict the rotation of the winding shaft. By swinging the brake release lever against the spring, the brake plate is separated and the brake is released, the winding shaft can be rotated, and the shutter curtain is lowered by its own weight. If the brake release lever is made free, the brake plate is pressed by the spring as the urging means so that the brake and the brake release lever are automatically returned.

The shutter device is equipped with a so-called evacuation stop device, and when the seat plate 4 at the lower end of the shutter curtain 1 falling under its own weight hits an obstacle and detects the obstacle, the brake of the switch 5 is returned via the return wire. Thus, the descent of the shutter curtain 1 is stopped. The return wire is composed of a first wire W1 and a second wire W2. In the upper part of the opening, a relay device 8 is provided on the side where the opening / closing machine 5 in the opening width direction is installed, and the seat plate 4 has an opening width direction so as to be positioned below the relay device 8. A locking device 9 is provided on one side. The lock device 9 includes a lock drum 90 positioned almost directly below the relay device 8, a winding drum 91 adjacent to the lock drum 90, and a lock mechanism that locks the rotation of the lock drum 90 when an obstacle is detected. Yes. The first wire W1 and the second wire W2 are connected via the relay device 8. One end of the first wire W1 is connected to the operating mechanism of the automatic closing device 6 so as to move the brake release body (first operating body 60) in the brake return direction, and the other end is connected to the relay device 8. . The first wire W1 extends in the outer cable W1 ′. One end of the second wire W <b> 2 is connected to the relay device 8, and the other end is wound around the lock drum 90 of the lock device 9 provided on the seat plate 4, and passes through the lock drum 90 to take up the winding drum 91. It is connected so that it can be wound around. The second wire W2 is drawn out so as to extend along the surface portion of the shutter curtain 1 as the shutter curtain 1 is lowered. The lock device 9 is provided on the upper seat plate 40, and the lower seat plate 41 of the shutter curtain 1 being lowered hits an obstacle and moves upward relative to the upper seat plate 40, whereby a return wire (second wire W2). ) Is mechanically restricted, and the brake release body (first operating body 60) is pulled in the brake return direction by the return wire (second wire W2 + first wire W1) in which the withdrawal is restricted. . In this way, when the lower seat plate 41 of the shutter curtain 1 that is falling under its own weight hits an obstacle, the brake release body (first operating body 60) is set by the return wire (second wire W2 + first wire W1). Is moved to the brake return position to stop the weight drop of the shutter curtain 1. When the obstacle is removed, the return wire can be pulled out, the brake release body (first operating body 60) moves in the brake release direction, and the shutter curtain 1 is lowered again by its own weight. In addition, after the obstacle is removed, the timing when the shutter curtain 1 descends again by its own weight is delayed.

As shown in FIG. 14, in the illustrated embodiment, the obstacle detection means uses a detection lever 42 that is rotatably provided between an upper seat plate 40 and a lower seat plate 41 constituting the seat plate 4. The configuration of the obstacle detection means will be described later in detail. In the illustrated embodiment, the locking device 9 is attached to the upper seat plate 40 at a position close to one side in the length direction of the seat plate 4, specifically, the side where the opening / closing device 5 in the opening width direction is provided. A rotatable lock drum 90, a rotatable take-up drum 91, a first rotation lever 92, a second rotation lever 93, a third rotation lever 94, and a case 95 that houses these, However, the configuration of the locking device 9 will be described in detail later. Further, the configuration of the delay means for re-falling the dead weight after the obstacle removal will be described in detail later.

As shown in FIG. 5, the relay device 8 is attached to the receiving member 15 of the lintel portion 14 above the opening. The receiving member 15 is a long member having a rectangular shape in cross section, and is attached between the lower ends of the left and right brackets 12 that support both ends of the winding shaft 2. As shown in FIGS. 2 and 4, the relay device 8 is positioned on the one side in the opening width direction above the opening and directly above the front-view locking device 9 so as to correspond to the vertically extending wire W <b> 2. Has been placed. As shown in FIG. 5, the relay device 8 is located on the opposite side of the housing 11 with respect to the shutter core C.

As shown in FIG. 7, the relay device 8 includes a rotating body 80 that is located above the opening and extends in the front-rear direction (inside and outside), and an attachment base 81 attached to the receiving member 15. The mounting base 81 includes left and right support pieces 810 to which the rotating body 80 is rotatably attached, and mounting pieces 811 to be attached to the receiving member 15. The rotating body 80 rotates about the rotation fulcrum 82 so that the first end portion and the second end portion in the front-rear direction move up and down. A fixing portion 83 at the end of the first wire W1 is formed at the first end, and a fixing portion 84 at the upper end of the second wire W2 is formed at the second end. The fixing portion 83 includes a first fixing portion 830 that fixes the end portion of the first wire W1 exposed from the outer cable W1 ′, leaving a surplus end portion, and a second fixing portion 831 that fixes the surplus end portion. The end portion of the first wire W1 is firmly fixed by the two fixing portions of the first fixing portion 830 and the second fixing portion 831. A fixing portion 832 at the end of the outer cable W1 ′ is provided below the fixing portion 83. The fixing portion 832 is attached to the lower part of the left and right support pieces 810 of the mounting base 81. The first wire W1 and the outer cable W1 ′ are guided in a direction away from the shutter core C through a guide 150 attached to the receiving member 15, and are connected to the operating mechanism (second operating body 61) of the automatic closing device 6. Has been. The fixing portion 84 sandwiches the end portion of the second wire W2, and an end portion of the second wire W2 is formed with a locking portion 840 having a large diameter with respect to the wire diameter at the end portion of the second wire W2. Is firmly fixed. When the second wire W2 fixed to the fixing portion 84 formed at the second end is pulled downward, the rotating body 80 rotates about the rotation fulcrum 82, and the second end falls downward. The first end portion moves upward to pull the first wire W1. As shown in FIG. 7, the relay device 8 includes a temporary fixing screw 85 that temporarily fixes one support piece 810 and the rotating body 80 at a predetermined position. The temporarily fixing screw 85 temporarily fixes the rotating body 80 at a predetermined angle (appropriate angle at the time of wire attachment) with respect to the mounting base 81 to restrict the rotation, and the rotating body 80 has the predetermined angle. By fixing the first wire W <b> 1 and the second wire W <b> 2 to the rotating body 80 when in the posture, it is not necessary to adjust the posture of the rotating body 80 when the wire is attached to the relay device 8. The temporary fixing screw 85 is removed after the wire is fixed.

As shown in FIGS. 2 and 4, a manual closing device 10 is provided on a wall surface in the vicinity of the shutter device so as to be easily operated. As shown in FIG. 8, the manual closing device 10 is a hollow vertically long rectangular parallelepiped, provided with a box 100 having an opening on the front surface, a cover body 101 that opens and closes an opening on the front surface of the box 100, and a lower portion of the front surface. A push switch 102, a turning lever 103 rotatably provided on a side portion of the front surface, a wire end fixing portion 104 for fixing the end portion (the other end) of the third wire W3 for manual operation with a screw, It has. In the box 100, an open switch U, a close switch D, and a stop switch S are arranged. The manual closing device 10 is electrically connected to the control units (obstacle obstacle detection control panel 7A, shutter control panel 7B). When the release switch U is pressed, the shutter curtain is operated by the switch 5 via the control unit. When 1 is raised and the closing switch D is pressed, the shutter curtain 1 is lowered by the switch 5 via the control unit, and when the stop switch S is pressed, the driving of the switch 5 is stopped via the control unit and the shutter Curtain 1 stops.

The manual closing device 10 is mechanically connected to one end of the manual operation third wire W3 so that the brake releasing operation and the brake returning operation of the operating mechanism of the automatic closing device 6 can be operated. The other end of the third wire W3 is connected to the operating mechanism (third operating body 62) of the automatic closing device 6. The manual closing device 10 operates so as to release the brake by the first operation (pressing operation of the emergency closing switch 102) from the state before the brake releasing operation, and the second operation (rotation) from the state after the brake releasing operation. The actuating lever 103) operates to return the brake. Here, a force is applied to the third wire W3 to pull the wire end fixing portion 104 upward (in FIG. 8) by a coil spring 621 of the automatic closing device 6 described later. The third wire W3 is locked so that the wire end fixing portion 104 does not move upward and loosen. When the emergency closing switch 102 is pressed, the lock is released, the wire end fixing portion 104 moves up a predetermined distance, the third wire 3 in a tension state is loosened, and the rotation lever 103 is moved with respect to the surface of the cover body 101. Tilt forward (brake release posture). Further, when the inclined rotating lever 103 is rotated downward (indicated by an arrow in FIG. 8), the wire end fixing portion 104 is pulled down to the lock position described above, and the third wire W3 is pulled by a predetermined distance, In a state where tension is applied to the third wire W3, the movement of the third wire W3 is restricted by the lock mechanism (brake return posture).

As shown in FIG. 5, the receiving member 15 of the lintel 14 above the opening is provided with a smoother element 16 on the opposite side of the casing 11 with respect to the shutter core C. Contact or interference with the lintel unit 14 or the relay device 8 is prevented. The smoother element 16 is fixed (for example, welded) to the receiving member 15 and includes two rollers 160 provided in steps in the opening width direction and the height direction. The smoother element 16 may be a single roller. The number of smoother elements 16 is appropriately selected from 1 to 5, for example, according to the opening width dimension.

In the shutter device that is provided with an emergency switch 17 on the upper side 140 of the lintel portion 14 and is electrically opened and closed in a normal state, if the shutter curtain 1 does not stop at the upper limit due to a failure of the limit switch LS, etc. When the emergency switch 17 serving as the upper limit overrun detector is activated, the shutter curtain 1 is stopped from being lifted by the switch 5. As shown in FIG. 6, the emergency switch 17 has a first abutment piece 170 protruding into the movement path of the shutter curtain 1 (the seat plate 4 contacts when the shutter curtain 1 rises beyond the upper limit position). The second abutment piece 171 that rises vertically and extends substantially horizontally rearward (the shutter curtain 1 continues due to a state in which the shutter curtain 1 that is being lowered hits an obstacle, failure of the obstacle detection means, etc. And the shutter curtain 1 wound around the winding shaft 2 increases in diameter and hangs downward to come into contact.

[B] Automatic closing device In the automatic closing device 6, a fire is detected by the fire detector 6a, and an operating mechanism is activated by the input of a fire detection signal from the disaster prevention panel 6b to move the brake release lever to release the brake. . Based on FIGS. 9-13, embodiment of the automatic closure apparatus 6 is described. The automatic closing device 6 shown in FIGS. 9 to 13 is only one embodiment, and the present invention is not limited by the configuration of the automatic closing device 6 shown in the figure.

The casing of the automatic closing device 6 is directly attached to the opening / closing machine 5, and three shafts 600, 610, 620 are arranged in parallel between the rising walls 6A, 6B facing each other. In the casing, a first operating body (first slide piece) 60, a second operating body (second slide piece) 61, and a third operating body (third slide piece) 62 are placed on shafts 600, 610, and 620, respectively. The first micro switch MS1 and the third micro switch MS3 are provided so as to be slidable and located in the moving path of the first operating body 60, and the second micro switch MS1 is positioned in the moving path of the second operating body 61. A switch MS2 is provided. The first microswitch MS1 and the third microswitch MS3 are arranged in a stacked manner in the depth direction of FIG. 9, and these two microswitches are turned ON and OFF simultaneously. One end of a return wire (first wire W1) is fixed to the second operating body 61. One end of a manual operation wire (third wire W3) is fixed to the third operating body 62. A long hole 500 is formed on the surface portion 6C of the casing so as to face the shaft 600, and the tip portion of the brake release lever 50 of the opening / closing machine 5 protrudes into the casing from the long hole 500 (see FIG. 28). .

The first operating body 60 is movable on the shaft 600 between a first position (a state at the time of electric opening and closing, that is, a standby position) and a second position (brake release position). A coil spring 601 is provided between the first operating body 60 and the first wall 6A. The first operating body 60 is a brake releasing body that is urged in the brake releasing direction, and is held in a first position by a latch lever 63 and a solenoid 64 that are latched to the first operating body 60 during electric opening and closing. Yes. The latch lever 63 is formed with a guide long hole 630 extending in the length direction of the shaft 620, and the shaft 641 protruding from the plunger 640 is located in the guide long hole 630. When the fire detection signal is input to the automatic closing device 6, the plunger 640 of the solenoid 64 is pulled, the latch lever 63 rotates, and the latched state between the latch lever 63 and the first operating body 60 is released. Then, the coil spring 601 extends and the first operating body 60 moves to the second position, and the brake release lever 50 of the switch 5 is pushed to release the brake. When the first operating body 60 slightly returns from the second position toward the first position, the brake release lever 50 returns and the brake returns. That is, in this embodiment, even if the 1st operation body 60 does not return to a 1st position, it will be in a brake return position (refer FIG. 13).

When the first operating body 60 is in the first position, the first microswitch MS1 and the third microswitch MS3 are OFF, and when the first operating body 60 is in the second position, the second microswitch M2 is ON. The first micro switch MS1 is turned ON when the first operating body 60 slides toward the second position (brake release position) when the brake is released, and the brake is released to the obstacle detection control panel 7A. An operation confirmation signal (fire mode or dead weight lowering mode recognition signal) to be transmitted is transmitted. The third micro switch MS3 is turned on when the first operating body 60 slides toward the second position (brake release position) when the brake is released, and the fire detection signal applied to the solenoid 64 is cut off to prevent disaster. The panel 6b is informed that the automatic closing device 6 has been released.

The second actuating body 61 can move on the shaft 610 between a first position (a state during electric opening and closing and a weight drop, that is, a standby position) and a second position (obstacle detection position). On the shaft 610, a coil spring 611 is provided between the second operating body 61 and the first wall 6A. The second operating body 61 is held at the first position by the extending coil spring 611. One end of the first wire W1 is coupled to the second operating body 61, and is mechanically connected to the repeater 8 by the first wire W1. When the lower seat plate 41 moves up relative to the upper seat plate 40 and detects an obstacle, the return wires (second wire W2, first wire W1) are pulled, and the second operating body 61 is moved to the second position. Slide towards position. The second micro switch MS2 is ON when the second operating body 61 is in the first position, and is OFF when the second operating body 61 slides toward the second position, and the obstacle detection control panel. An obstacle detection signal (seat plate operation signal) is transmitted to 7A to notify that the seat plate 4 is activated and an obstacle is detected. During the electric descent, the descent of the shutter curtain 1 stops based on the obstacle detection signal. When the seat plate 4 detects an obstacle when the weight of the switch 5 is lowered due to the release of the brake (the first operating body 60 moves to the second position and is close to the second operating body 61), When the operating body 61 slides toward the second position, the first operating body 60 slides toward the first position as the second operating body 61 moves, and the first operating body 60 becomes the brake return position. Then, the brake of the opening / closing machine 5 is returned.

The third operating body 62 is movable on the shaft 620 between a first position (a state at the time of electric opening and closing, that is, a standby position) and a second position (brake release position by manual operation). On the shaft 620, a coil spring 621 is provided between the third operating body 62 and the first wall 6A. The latch lever 63 is connected to the third operating body 62 via a shaft 631, and the latch lever 63 is configured to slide on the shaft 620 together with the third operating body 62. At this time, the latch lever 63 moves with respect to the shaft 641 through the guide slot 630. The third operating body 62 is mechanically connected to the manual closing device 10 by the third wire W3. When the emergency button 102 of the manual closing device 10 is pressed, the tensioned third wire W3 is loosened and the coil spring is released. 621 is extended, and the third operating body 62 and the latch lever 63 slide from the first position toward the second position. At the same time, the first operating body 60 is engaged with the latch lever 63. While maintaining, the coil spring 601 extends and slides from the first position to the second position, and the brake release lever 50 is pushed to release the brake of the switch 5 (see FIG. 11). .

The state of FIG. 9 shows the automatic closing device 6 at the time of monitoring (at the time of complete return), and the automatic closing device 6 is in the state of FIG. 9 during normal electric opening and closing, and each element is in a fixed position. The position of the first operating body 60, the position of the second operating body 61, and the position of the third operating body 62 in FIG. 9 are defined as the first position. In the state of FIG. 9, the first microswitch MS1 is OFF, the second microswitch MS2 is ON, and the third microswitch MS3 is OFF. The first operating body 60 is in the first position which is a standby position, the latch lever 63 is in a locked state with the first operating body 60, and the first operating body 60 is urged in the brake release direction by the coil spring 601. Held in the first position. The latching state of the first operating body 60 and the latch lever 63 is held by a solenoid 64. When the solenoid 64 receives a fire detection signal and the plunger 640 is pulled, the latch lever 63 is released. The second operating body 61 is held at the first position by the force of the coil spring 611. The third operating body 62 is held in the first position by locking the other end side of the manual operation third wire W3 while being biased in the brake release direction by the coil spring 621.

FIG. 10 shows a state in which the automatic closing device 6 receives the fire detection signal and operates to release the brake in the state of FIG. The plunger of the solenoid 64 is pulled by the input of the fire detection signal, the latch lever 63 is tilted through the shaft 641 and the guide long hole 630, and the locking state of the first operating body 60 and the latch lever 63 is released. The spring 601 extends, and the first operating body 60 slides along the axis 600 from the first position to the second position. When the first operating body 60 moves to the second position, the brake release lever 50 is pushed and the brake of the opening / closing machine 5 is released. The first micro switch MS1 and the third micro switch MS3 are turned from OFF to ON. An operation confirmation signal is transmitted to the obstacle detection control panel 7A by detection of the first micro switch MS1, and transmission of a fire detection signal from the disaster prevention panel 6b to the automatic closing device 6 is blocked by detection of the third micro switch MS3. The In the state shown in FIG. 10, the second operating body is in the first position, the third operating body is in the first position, and the second microswitch MS2 is in the ON state.

FIG. 11 shows a state in which the brake is released by an operation from the manual closing device 10 in the state of FIG. When the emergency button 102 of the manual closing device 10 is pressed, the third wire W3 is loosened, the coil spring 621 is extended, and the third operating body 62 and the latch lever 63 slide from the first position toward the second position. At the same time, the first operating body 60 is maintained in the locked state with the latch lever 63, the coil spring 601 extends, slides from the first position toward the second position, and the brake. The release lever 50 is pushed to release the brake of the switch 5. The first micro switch MS1 and the third micro switch MS3 are turned from OFF to ON. An operation confirmation signal is transmitted to the obstacle detection control panel 7A by the detection of the first micro switch MS1. In the state shown in FIG. 11, the second operating body is in the first position, and the second microswitch MS2 is in the ON state.

FIG. 12 shows a state in which obstacle detection is performed during electric descent (the state of FIG. 9). When the seat plate 4 detects an obstacle, the first wire W1 is pulled, and the second operating body 61 slides from the first position to the second position while compressing the coil spring 611. By the sliding movement of the second operating body 61 to the second position, the second micro switch MS2 is turned from ON to OFF, and an obstacle detection signal is transmitted to the obstacle detection control panel 7A. When an obstacle detection signal is input to the obstacle detection control panel 7A, the electric lowering of the switch 5 is stopped via the shutter control panel 7B (in one embodiment, after the stop, the electric descent is stopped, that is, touched. Up). In FIG. 12, the first operating body 60 and the third operating body 62 are in the first position, and the first microswitch MS1 and the third microswitch MS3 are in the OFF state. In the state shown in FIG. 12, when the obstacle is removed, the pulling force of the first wire W1 disappears, the coil spring 611 expands, and the second operating body 61 returns to the first position. The second micro switch MS2 is turned from OFF to ON.

FIG. 13 shows a state in which an obstacle is detected when the dead weight is lowered based on the input of the fire detection signal (the state shown in FIG. 10). As shown in FIGS. 10 and 11, when the dead weight is lowered, the first operating body 60 in the second position and the second operating body 61 in the first position are close to each other, and the second operating body 61 is recessed. The end portion of the large-diameter portion 60A of the first operating body 60 is located in the vicinity of the stepped portion 61A. When the seat plate 4 detects an obstacle, the first wire W1 is pulled, and the second operating body 61 slides from the first position toward the second position while compressing the coil spring 611. At this time, the stepped portion 61A of the second operating body 61 abuts against the end of the large diameter portion 60A of the first operating body 60, whereby the second operating body 61 slides to the second position and the second The first actuating body 60 at the position slid toward the first position and slightly returns. When the first operating body 60 that has pushed the brake release lever 50 moves slightly toward the first position to reach the brake return position, the brake release lever 50 becomes free and the brake of the switch 5 returns. The weight drop stops. In FIG. 13, the second operating body 61 slides from the first position to the second position, and at this time, the second micro switch MS2 is turned from ON to OFF. The first operating body 60 is in a brake return position that has returned slightly from the second position toward the first position, and the first microswitch MS1 and the third microswitch MS are in the ON state. The third operating body 62 is in the first position. Further, when obstacle detection is performed when the weight is lowered by the operation from the manual closing device 10 (the state shown in FIG. 11), the third operating body 62 is in the second position, except that the third operating body 62 is in the second position. The same. After removal of the obstacle, the return wires (first wire W1, second wire W2) can be pulled out, the coil spring 611 extends, and the second operating body 61 slides toward the first position, At the same time, the coil spring 601 extends, the first operating body 60 slides toward the second position, the brake release lever 50 is pushed, the brake is released, and the shutter curtain 1 is lowered again by its own weight.

9 to 13 show the automatic closing device 6 in which the operation part (solenoid) that operates by the input of the fire detection signal and the brake release / return mechanism is integrated, the operation part (solenoid) and the brake release The return mechanism may be physically separated, and the operating unit (solenoid) and the brake release / return mechanism may be mechanically connected by a wire or the like (see Patent Document 1). In this specification, the operation mechanism of the automatic closing device includes such a separate brake release / return mechanism.

[C] Control Unit In the electric shutter with a mechanical evacuation stop device according to the present invention, different control is performed in the electric open / close mode (normal mode) and the self-weight drop mode (fire mode). During normal electric opening and closing, the operation control of the shutter curtain 1 is performed in the normal mode. When the fire detection signal is input to the automatic closing device 6 or when the weight is lowered by a manual closing operation, the control mode is changed from the normal mode to the weight reduction mode, and the operation control of the shutter curtain 1 is performed in the weight reduction mode. In the present embodiment, the control unit includes an obstacle detection control panel 7A and a shutter control panel 7B. Details will be described below.

[C-1] Electric Open / Close Mode In the normal mode, the shutter curtain 1 is electrically opened / closed by an operation from the manual closing device 10. More specifically, when the opening switch U is pressed in the fully closed state or half-opened state of the opening, a signal is transmitted to the shutter control panel 7B via the obstacle detection control panel 7A, and the opening / closing machine 5 operates to wind the winding. The take-up shaft 2 is rotated in the first direction and raised while winding the shutter curtain 1 (FIG. 33 (1)). When the shutter curtain 1 is raised, the second wire W2 is wound around the winding drum 91. When the shutter curtain 1 rises to a preset upper limit position, the upper limit switch is activated, the operation of the switch 5 is stopped, the rotation of the winding shaft 2 is stopped, and the winding of the shutter curtain 1 is stopped. If the shutter curtain 1 does not stop at the upper limit due to a failure of the limit switch LS or the like, the emergency switch 17 is activated to stop the opening of the shutter curtain 1 by the switch 5.

When the closing switch D is pressed in the fully open state or half open state of the opening, a signal is transmitted to the shutter control panel 7B through the obstacle detection control panel 7A, and the opening / closing machine 5 is operated to move the winding shaft 2 to the second position. The shutter curtain 1 is lowered by rotating in the direction (FIG. 33 (2)). When the shutter curtain 1 is lowered, the second wire W <b> 2 is drawn out from the winding drum 91 while extending along the surface portion of the shutter curtain 1. When the lower seat plate 41 at the lower end of the lowering shutter curtain 1 hits an obstacle, the lower seat plate 41 moves upward relative to the upper seat plate 40, and the lock device 9 restricts the second wire W2 from being pulled out. When the upper seat plate 40 is moved downward with respect to the lower seat plate 41, the second wire W2 whose withdrawal is restricted is pulled, and the first wire W1 is pulled via the relay device 8, so that the second operating body is pulled. 61 moves to the second position, the second micro switch MS2 turns from ON to OFF, and an obstacle detection signal (seat plate operation signal) is transmitted to the obstacle detection control panel 7A. The control panel for obstacle detection 7A that has received the obstacle detection signal stops the operation of the switch 5 for a predetermined time (for example, 1 second) via the shutter control panel 7B, and then operates the switch 5 to operate the shutter curtain. 1 is raised for a predetermined time (for example, 1.5 seconds) (touch-up) and then stopped ((3) in FIG. 33). Thereafter, by pressing the closing switch D of the manual closing device 10, the shutter curtain 1 can be lowered again electrically.

When the lower seat plate 41 of the lower end of the shutter curtain 1 that is electrically lowered is landed, the lower seat plate 41 is moved upward relative to the upper seat plate 40, and the lock device 9 restricts the second wire W2 from being pulled out. When the upper seat plate 40 is moved downward with respect to the lower seat plate 41, the second wire W2 whose withdrawal is restricted is pulled, the first wire W1 is pulled via the relay device 8, and the second operating body 61 is pulled. Moves to the second position, the second micro switch MS2 turns from ON to OFF, and an obstacle detection signal is transmitted to the obstacle detection control panel 7A. The control panel for obstacle detection 7A that has received the obstacle detection signal stops the operation of the switch 5 and stops the descent of the shutter curtain 1 via the shutter control board 7B (FIG. 33 (2)). The timer is activated when the shutter curtain 1 is lowered to a preset lower limit position during electric lowering, and the touch-up is not performed when an obstacle detection signal is output during the timer operation. If no obstacle detection signal is output during the timer operation, the operation of the opening / closing machine 5 is stopped via the obstacle detection control panel 7A and the shutter control panel 7B when the timer ends, and the winding shaft 2 rotates. To stop.

[C-2] Self-weight drop mode When the brake release operation of the automatic closing device 6 is performed by inputting a fire detection signal from the disaster prevention panel 6b or pressing the emergency button 102 of the manual closing device 10, the first operating body 60 is Moving to the second position, the first microswitch MS1 and the third microswitch MS3 are turned from OFF to ON. When the first micro switch MS1 is turned on, an operation confirmation signal is continuously output from the automatic closing device 6 to the obstacle detection control panel 7A, and the obstacle detection control panel 7A receives the operation confirmation signal to Changes from open / close mode (normal mode) to dead weight drop mode (fire mode). When the obstacle detection control panel 7A is in its own weight drop mode, the electric opening / closing operation from the opening switch U, the closing switch D, and the stop switch S of the manual closing device 10 is invalidated.

When the lower seat plate 41 at the lower end of the shutter curtain 1 that is falling under its own weight hits an obstacle, the lower seat plate 41 moves up relative to the upper seat plate 40, and the lock device 9 restricts the second wire W2 from being pulled out. Then, when the upper seat plate 40 is moved downward with respect to the lower seat plate 41, the second wire W2 whose pulling is restricted is pulled, and the first wire W1 is pulled via the relay device 8 to perform the second operation. The body 61 moves to the second position, the second micro switch MS2 turns from ON to OFF, and an obstacle detection signal is transmitted to the obstacle detection control panel 7A (at the time of a power failure, the obstacle detection signal is not transmitted. ). When the second operating body 61 moves to the second position, the first operating body 60 in the second position (brake release position) moves in the brake return direction, and the brake of the switch 5 returns. The shutter curtain 1 during its own weight descent stops. When energization is effective when the dead weight is lowered, the obstacle detection control panel 7A that has received the obstacle detection signal operates the opening / closing device 5 via the shutter control panel 7B to cause the shutter curtain 1 to move to the obstacle. After the detection signal is raised for a predetermined time (for example, 1.5 seconds), it is stopped (FIG. 29 (3)). Further, when energization is effective when the dead weight is lowered, the shutter curtain during the dead weight may be stopped without raising (touching up) the shutter curtain 1 based on the reception of the obstacle detection signal. . At the time of a power failure, the 1st operation body 60 moves to a brake return direction, the brake of the opening / closing machine 5 resets, and the shutter curtain 1 under a dead weight fall will be in the stopped state. When the obstacle is removed, the lower seat plate 41 that has moved upward can be moved downward, the restriction of the second wire W2 being pulled out is released, the coil spring 611 is extended, and the second operating body 61 is moved to the first operating body 61. At the same time, the coil spring 601 extends and the first operating body 60 slides to the second position, the brake of the switch 5 is released by the brake release lever 50, and the shutter curtain 1 is lowered again by its own weight ( FIG. 29 (3)). When the lower seat plate 41 at the lower end of the shutter curtain 1 under its own weight descends, the lower seat plate 41 moves upward relative to the upper seat plate 40, and the lock device 9 restricts the drawing of the second wire W2. When the upper seat plate 40 is moved downward with respect to the lower seat plate 41, the second wire W2 whose withdrawal is restricted is pulled, and the first wire W1 is pulled via the relay device 8, so that the second operating body is pulled. 61 moves to the second position, the second micro switch MS2 is turned from ON to OFF, and an obstacle detection signal is transmitted to the obstacle detection control panel 7A (at the time of a power failure, the obstacle detection signal is not transmitted). . Regardless of energization or power failure, when the second operating body 61 moves to the second position, the first operating body 60 in the second position (brake release position) moves in the brake return direction and opens and closes. The brake of the machine 5 is restored, and the shutter curtain 1 that is descending its own weight is stopped and fully closed (FIG. 29 (3)). Even when energization is effective at the time of falling due to its own weight, so-called touch-up is not performed at the time of landing, as in the case of electric descent.

When the automatic closing device 6 releases the brake while the shutter curtain is electrically raised, the first operating body 60 moves to the second position, and the first micro switch MS1 and the third micro switch MS3 are turned from OFF to ON. When the first micro switch MS1 is turned ON, an operation confirmation signal is transmitted from the automatic closing device 6 to the obstacle detection control panel 7A, and the obstacle detection control panel 7A receives the operation confirmation signal to While switching from the open / close mode (normal mode) to the self-weight drop mode (fire mode), simultaneously with the reception of the operation confirmation signal, the driving of the switch 5 is stopped via the shutter control panel 7B, and the shutter curtain starts its own weight drop ( FIG. 34 (1)). When the automatic closing device 6 releases the brake during the electric lowering of the shutter curtain, the first operating body 60 moves to the second position, and the first micro switch MS1 and the third micro switch MS3 are turned from OFF to ON. When the first micro switch MS1 is turned ON, an operation confirmation signal is transmitted from the automatic closing device 6 to the obstacle detection control panel 7A, and the obstacle detection control panel 7A receives the operation confirmation signal to While switching from the open / close mode (normal mode) to the self-weight drop mode (fire mode), simultaneously with the reception of the operation confirmation signal, the driving of the switch 5 is stopped via the shutter control panel 7B, and the shutter curtain starts its own weight drop ( FIG. 34 (2)).

[D] Configuration of Seat Plate The configuration of the seat plate 4 provided with obstacle detection means will be described. As shown in FIG. 14, a plurality of detection levers 42 are rotatably provided between an upper seat plate 40 and a lower seat plate 41 constituting the seat plate 4, and the shutter during electric descent or under its own weight descent. When the lower end of the curtain 1 comes into contact with an obstacle and the lower seat plate 41 moves up relative to the upper seat plate 40, the detection lever 42 is rotated in conjunction with the upward movement of the lower seat plate 41. It has become. The plurality of detection levers 42 are connected to each other by a wire 43, and one end of the wire 43 is connected to a lower end side of a first rotation lever 92 (described later) constituting a lock mechanism of the lock device 9 via a coil spring 98. Has been. When the lower seat plate 41 moves up relative to the upper seat plate 40, the detection lever 42 rotates in a direction in which the lower end of the detection lever 42 is separated from the lock drum 90 of the lock device 9, and the wire 43 is moved to the lock device. 9 is pulled away from the lock drum 90.

When the wire 43 is pulled and the first rotation lever 92 is rotated, the lock mechanism 90 is controlled by a lock mechanism (details will be described later) of the lock device 9, and the lock device 9 is moved while the shutter curtain 1 is being lowered. The drawing of the second wire W2 drawn out from the wire stops, and the shutter curtain 1 descends, whereby the second wire W2 is drawn downward, and the first wire W1 is drawn via the relay device 8. The first operating body 60 moves to the brake return position, the pressing of the brake release lever 50 is released, the brake is returned by the return means built in the brake of the opening / closing machine 5, and the shutter curtain 1 being lowered is Stop.

As shown in FIG. 15, the detection lever 42 is rotatably attached to a support portion 42 </ b> A fixed inside the upper surface portion 400 of the upper seat plate 40. As shown in FIG. 14, the detection lever 42 is attached in an inclined posture such that the upper end side is close to the lock device 9 and the lower end side is far from the lock device 9. A roller as a contacted portion 420 is rotatably provided at the lower end of the detection lever 42. When the lower seat plate 41 moves upward during obstacle detection, the roller is pushed up to the bottom surface portion 410 of the lower seat plate 41. The detection lever 42 is rotatable about the upper rotation fulcrum 421 in a direction in which the lower end side is separated from the lock device 9. A protruding portion 422 is formed on the locking device 9 side of the intermediate portion in the longitudinal direction of the detection lever 42, and an insertion portion 423 for the wire 43 is provided in the protruding portion 422. The abutting portion formed on the wire 43 abuts around the insertion portion 423, so that the wire 43 is pulled in conjunction with the rotation of the detection lever 42. When the lower seat plate 41 moves upward from the state of FIGS. 15A and 15B, the detection lever 42 is pushed up by the bottom surface portion 410 of the lower seat plate 41, and the detection lever 42 is shown by a two-dot chain line from the solid line posture of FIG. The wire 43 is pulled in a direction away from the lock device 9. The insertion portion 423 of the wire 43 is rotatably attached to the protruding portion 422, and coupled with the insertion portion 423 provided in the protruding portion 422, the wire 43 has an insertion portion 423 when the detection lever 42 is rotated. The horizontal posture is maintained as much as possible. Further, as shown in FIGS. 15B and 15D, in the normal inclined posture of the detection lever 42, the insertion portion 423 is located on the right side (opposite to the rotation direction) with respect to the rotation fulcrum 421. Thus, the amount of fluctuation in the vertical direction of the insertion portion 423 when the detection lever 42 is rotated is suppressed to a small value. As shown in FIGS. 15A and 15B, in a normal state where the lower seat plate 41 is suspended from the upper seat plate 40, the upper portion of the detection lever 42 is inclined by contacting the support portion 42A. The posture is maintained, and the circumferential surface of the roller at the lower end of the detection lever 42 is slightly spaced upward from the bottom surface portion 410 of the lower seat plate 41 (FIG. 15A). In a normal state, the roller peripheral surface and the bottom surface portion 410 of the lower seat plate 41 may be in contact with each other.

As shown in FIG. 15 (A), the upper seat plate 40 has an upper surface portion 400, left and right side surface portions 401 that hang from both ends in the width direction of the upper surface portion 400, and a direction approaching each other from the lower ends of the left and right side surface portions 401. The left and right horizontal contact pieces 411 at the upper end of the lower seat plate 41 are placed on the contact pieces 402 of the upper seat plate 40, so that the upper seat plate 40 has a horizontal contact piece 402 extending horizontally. On the other hand, the lower seat plate 41 is suspended. The horizontal abutment piece 411 of the lower seat plate 41 is formed with a vertical rising piece 412 that is close to and opposed to the side surface portion 401 of the upper seat plate 40, and an obstacle at the lower corner of the lower seat plate 41. Even when the lower seat plate 41 hits, the rising piece 412 of the lower seat plate 41 abuts against the side surface portion 401 of the upper seat plate 40, and the tilting is restricted. It is restricted to tilt in the direction (thickness direction of shutter curtain).

It should be noted that the configuration of the obstacle detection means of the seat plate 4 described above is one embodiment, and does not limit the scope of rights of the present invention. For example, the obstacle detection means detects an upward movement of the lower seat plate 41 by using a detection body rotatably provided between the upper seat plate 40 and the lower seat plate 41 constituting the seat plate 4. The shape and the number of the detection bodies are not limited to those shown in the drawing, and the detection bodies may be ones that do not use the wires 43 (for example, the detection bodies are rotating bodies that extend in the length direction of the seat plate).

[E] The configuration of the locking device 9 will be described in detail with reference to FIGS. 16 and FIGS. 17 to 20 have different parts in the shape of the elements, but the components themselves are the same. The reference numerals of the elements are described in most detail in FIG. 17 and should be referred to as appropriate. The lock device 9 includes a rotatable lock drum 90, a rotatable winding drum 91, a first rotation lever 92, a second rotation lever 93, and a third rotation lever 94. And a case 95. In the present embodiment, the lock drum 90 is located directly below the relay device 8, and the take-up drum 91 is disposed adjacent to the first side of the lock drum 90, The second rotation lever 93 and the third rotation lever 94 are disposed adjacent to the second side of the lock drum 90. At the normal time, the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the first posture (unlocked posture) (see FIGS. 16 and 20). When the shutter is stopped due to obstacle detection, the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the second position (lock position) (see FIG. 17), and the second time While the moving lever 93 maintains the second posture, the locked state of the locking device 9 is maintained even if the first rotating lever 92 starts to rotate (see FIGS. 18 and 19).

The case 95 includes an upper plate 950, left and right side plates 951 and 952, a rear plate 953, and a detachable front cover 954 (see FIG. 4), and the lower surface is open. The upper plate 950 is formed with a guide 9500 through which the second wire W2 is inserted. As shown in FIG. 16, a front plate 954 ′ is provided on the front side of the lock drum 90 and the take-up drum 91 so as to face the rear plate 953 with the lock drum 90 and the take-up drum 91 interposed therebetween. The front plate 954 ′ extends so as to cover at least the front side of the central portion of the lock drum 90 and the take-up drum 91 (the portion corresponding to the support shafts 900 and 910). In the illustrated embodiment, the front plate 954 ′ is integrally formed with bent pieces on the upper and right sides, the upper bent piece is brought into contact with the upper plate 950, and the right bent piece is brought into contact with the side piece 952 and screwed into the case 95. Fixed. One end of the support shaft 900 and the support shaft 910 is supported by the rear plate 953 and the other end is supported by the front plate 954 ′. By supporting the support shaft 900 and the support shaft 910 at both ends, the lock drum 90 and the winding drum 91 can be rotationally supported more stably than the cantilever support. In the embodiment shown in FIG. 16, a guide portion 958 for inserting a wire W3 extending between the lock drum 90 and the take-up drum 91 is formed at the bent portion at the lower end of the front plate 954 ′. Although not shown in FIGS. 16 and 17, a front cover 954 is further provided on the front surface of the case 95. The lower ends of the side pieces 951 and 952 are folded outward to form bent pieces 956 and 957, respectively, and the case 95 is seated with screws 956a and 957a (see FIG. 14) via the bent pieces 956 and 957. It is attached to the upper surface portion 400 of the plate 40. Since the case 95 is attached to the upper seat plate 40 using screws 956a and 957a exposed to the outside, it is easy to remove the case 95 during maintenance.

The lock drum 90 includes a support shaft 900 that rotatably supports the lock drum 90, a concave peripheral surface 901 around which a wire is wound, and a peripheral edge of the lock drum 90 (specifically, in the thickness direction of the peripheral surface 901). And a plurality of tooth-like locked portions 903 formed continuously at the periphery of the disc portion 902 having a diameter larger than that of the peripheral surface 901. In one aspect, the circumferential dimension of the peripheral surface 901 is such that the wire can be wound three times in parallel.

The winding drum 91 is a support shaft 910 that rotatably supports the winding drum 91, a peripheral surface 911 that winds the wire, and a means for urging the winding drum 91 in the winding direction of the wire. A mainspring (not shown).

The first rotation lever 92 is a rotation piece extending in the vertical direction, and includes an upper first portion 920 and a second portion 921 extending downward with a slight angle with respect to the first portion 920. And a rotation fulcrum 922 (formed by a support shaft P1 projecting from the rear plate 953 of the case 95) formed at the connecting portion between the first portion 920 and the second portion 921. The case 95 is movably provided.

The first turning lever 92 is centered around the turning fulcrum 922, in the first direction (locking direction) in which the upper first portion 920 approaches the lock drum 90, and the upper first portion 920 is in the lock drum 90. It is possible to turn in the second direction (the unlocking direction) of the direction away from the head. During normal opening / closing and stopping, the first rotation lever 92 is in a first posture in which the upper first portion 920 is rotated to the side away from the lock drum 90 (see FIGS. 16 and 20), and is locked. When the device 9 is in the locked state, the first turning lever 92 is in the second posture in which the upper first portion 920 is turned to the side close to the lock drum 90 (see FIG. 17).

The first turning lever 92 is urged in the second direction by a coil spring 96 exemplified as an urging means. In the illustrated embodiment, one end of the coil spring 96 is connected to a pin P2 projecting from the rear plate 953 of the case 95 near the lower end of the left side plate 951 of the case 95, and the other end is a first rotating lever. The upper end of the first portion 920 of the 92 is connected to the side away from the lock drum 90. A pin P3 as a stopper protrudes from a predetermined portion of the rear plate 953 of the case 95. When the first rotation lever 92 is in the first posture, the first portion 920 of the first rotation lever 92 is A portion on the side away from the lock drum 90 is in contact with the pin P3.

The lower side of the second portion 921 of the first rotation lever 92 extends downward from the lower end of the case 95, and a hook-shaped locking portion 92a (see FIG. 16) is formed at the lower end. The end of the wire 43 (when the coil spring 98 (see FIG. 14) is connected to the end of the wire 43), the end of the wire 43 is detachably locked to the locking portion 92a. . When pulled by the wire 43 in conjunction with the upward movement of the lower seat plate 41, the first rotation lever 92 overcomes the urging force of the coil spring 96 and rotates in the first direction. The engaging portion 92a is opposite to the opening formed on the opposite side of the lower end side of the first rotation lever 92 from the side on which the wire 43 extends, the groove portion extending downward from the opening, and the side on which the wire 43 extends by the groove portion. And a bottom portion of the groove portion slightly bulges to the wire 43 side, and an upper end of the rising portion is formed thick adjacent to the opening. The shape of the locking portion 92a is such that the wire 43 does not come off the locking portion 92a regardless of the rotation position of the first rotation lever 92 during the operation of the mechanical evacuation stop device. Is formed. This is advantageous because the end of the wire 43 can be removed from the locking portion 92a during maintenance.

The second rotating lever 93 is an isosceles triangular rotating piece having short sides 930 and 931 and a long side 932, and the short side 931 and the long side 932 are opposed to the lock drum 90. The case 95 is provided so as to be rotatable about a rotation fulcrum 933 (formed by a support shaft P1 projecting from the rear plate 953 of the case 95) formed close to the apex located on the lower side. is there. In the illustrated embodiment, the rotation fulcrum 933 of the second rotation lever 93 and the rotation fulcrum 922 of the first rotation lever 92 are formed from a common support shaft P1. A locking portion 934 is formed in proximity to the apex formed by the short sides 930 and 931, and a contact portion 935 is formed in proximity to the long side 932 so as to be separated from the locking portion 934. A contact portion 936 is formed in the vicinity of the apex formed by the short side 930 and the long side 932. The locking portion 934 of the second rotation lever 93 has a shape that can be engaged and disengaged with the locked portion 903 (gear of the gear) of the lock drum 90.

In the present embodiment, the second rotation lever 93 includes two opposing plates, the support shaft P1 is provided between the two plates, and the locking portion 934 connects the two plates. The abutting portion 935 is a pin that connects the two plates, and the abutting portion 936 is rotatably mounted on the pin that connects the two plates. It is a bearing. In addition, the structure which consists of two plates is only one aspect of the 2nd rotation lever 93. FIG.

The second rotation lever 93 is rotatable about a lower rotation fulcrum 933 in a first direction in which the upper side approaches the lock drum 90 and in a second direction in which the upper side separates from the lock drum 90. It has become. At the time of normal opening / closing and stopping, the second turning lever 93 is in the first posture in which the upper side is turned to the side away from the lock drum 90 (see FIGS. 16 and 20), and the lock device 9 is in the locked state. The second turning lever 93 is in a second posture in which the second turning lever 93 is turned to the side close to the lock drum 90 (see FIG. 17). When the second rotation lever 93 is in the first posture, the locking portion 934 is in the non-locking state separated from the locked portion 903 of the lock drum 90, and the contact portion 935 includes the first locking lever 934. A portion of the first portion 920 of the rotating lever 92 on the side close to the locking device is in contact. When the second rotation lever 93 is in the second posture, the locking portion 934 is locked with the locked portion 903 of the lock drum 90. When the locking portion 934 of the second rotation lever 93 and the locked portion 903 of the lock drum 90 are in the locked state, the rotation of the lock drum 90 is restricted, and the lock device 9 is restricted from pulling out the wire W3. Locked.

The second turning lever 93 is urged in the second direction by a coil spring 97 exemplified as an urging means. In the illustrated embodiment, one end of the coil spring 97 is connected to a pin P2 projecting from the rear plate 953 of the case 95 in the vicinity of the lower end of the left side plate 951 of the case 95, and the other end is a second rotating lever. 93 is connected to the abutting portion 935. In the illustrated embodiment, the coil spring 97 that biases the second rotating lever 93 in the second direction and the coil spring 96 that biases the first rotating lever 92 in the second direction are connected to a common pin P2. However, separate pins may be prepared and connected to the separate pins. In the illustrated embodiment, the pin that forms the contact portion 935 also serves as the connecting portion at the other end of the coil spring 97. However, as shown in FIG. The other end of the coil spring 97 may be connected to the piece 935 ′).

The contact portion 935 of the second rotation lever 93 is in contact with a portion of the first portion 920 on the upper side of the first rotation lever 92 that is close to the lock drum 90. When the wire 43 is pulled in conjunction with the upward movement of the lower seat plate 41 and the first rotation lever 92 overcomes the urging force of the coil spring 96 and rotates in the first direction, the first rotation lever 92 When the first portion 920 presses the contact portion 935 of the second rotation lever 93, the second rotation lever 93 overcomes the urging force of the coil spring 97 and rotates in the first direction. When the second rotation lever 93 is rotated in the first direction, the locking portion 934 of the second rotation lever 93 that is separated from the locked portion 903 of the lock drum 90 is It is locked to the locked portion 903 and is locked.

The third rotation lever 94 is a member that is positioned above the first rotation lever 92 and the second rotation lever 93 and extends in the lateral direction, and is in a locked state (second posture). It is a rotation restricting means for restricting the rotation of the lever 93 in the second direction, in other words, a holding lever that holds the locked state of the second rotation lever 93 for a predetermined time after the obstacle is removed. The third turning lever 94 is provided in the case 95 so as to be turnable with an end portion on the side close to the lock drum 90 as a rotation fulcrum 940, and the end portion on the side far from the lock drum 90 is up and down. It can be rotated in the direction. The pivot fulcrum 940 is formed from a support shaft P4 that protrudes from the rear plate 953 of the case 95.

When the first rotation lever 92 and the second rotation lever 93 are in the first posture, the third rotation lever 94 has a tip that is the end far from the lock drum 90 at the first position (upper side). When the first rotation lever 92 and the second rotation lever 93 are in the second posture, the tip is rotated to the second position (lower side). It is in the 2nd attitude | position which moved (refer FIG. 17).

A lower portion of the third rotation lever 94 extending in the lateral direction has the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 when the lock device 9 is in a locked state. A locking portion 941 that locks with the contact portion 936 of the second rotation lever 93 when in the second posture is formed. A contact portion 942 is formed at a lower portion of the third rotation lever 94 so as to be positioned on the distal end side with respect to the locking portion 941.

In the present embodiment, the third rotation lever 94 includes two opposing plates, the support shaft P4 is provided between the two plates, and the locking portion 941 is between the tips of the two plates. The abutment portion 942 is a bearing that is rotatably mounted on a pin that connects the two plates. The configuration composed of two plates is only one aspect of the third rotation lever 94, and the locking portion 941 may be integrally formed. In the illustrated embodiment, the locking portion 941 has a stepped shape when viewed from the side, but the shape of the locking portion 941 is not limited and may be a claw shape or a protrusion shape.

When the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the first posture, the corner portion of the locking portion 941 of the third rotation lever 94 is the second rotation lever 93. The third rotation lever 94 is restricted from rotating downward, and the first posture is maintained. From this state, when the second rotation lever 93 rotates in the first direction, the contact portion 936 of the second rotation lever 93 gets over the corner of the locking portion 941 of the third rotation lever 94. At the same time, the third rotation lever 94 rotates downward, and the contact portion 936 of the second rotation lever 93 is locked to the locking portion 941.

As shown in FIG. 17, when the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the second posture, the contact portion 936 of the second rotation lever 93 is the third The abutment portion 923 formed on the upper end of the first rotation lever 92 is opposed to the engagement side 9410 of the engagement portion 941 of the rotation lever 94, and the contact portion 942 of the third rotation lever 94. Abut. The contact state of the contact portion 923 of the first rotation lever 92 and the contact portion 942 of the third rotation lever 94 and the engagement of the contact portion 936 of the second rotation lever 93 and the third rotation lever 94 When the portion 941 is opposed to the locking side 9410 (see FIG. 17) or in the locked state (see FIG. 18), at least the first rotation lever 92 rotates a predetermined amount from the second posture to the second direction. It is maintained while you do. When the third rotation lever 94 in the second posture rotates upward by a predetermined amount, the locking portion 941 of the third rotation lever 94 and the contact portion 936 of the second rotation lever 93 are locked. Is released, the rotation restriction by the third rotation lever 94 is released, and the second rotation lever 93 in the second posture is rotated in the second direction by the force of the coil spring 97.

A circumferential projection piece 943 is formed on the distal end side of the third rotation lever 94, and when the third rotation lever 94 is in the first position, the projection piece 943 contacts the left side piece 951. The third turning lever 94 is restricted from turning further upward. This prevents the third turning lever 94 from jumping up when it is turned from the second posture to the first posture.

The operation of the locking device will be described. When the shutter curtain 1 starts to descend, the lock device 9 (lock drum 90, take-up drum 91) provided on the seat plate 4 also descends as the seat plate 4 descends, and as the lock device 9 descends, Overcoming the force of the mainspring spring, the second wire W2 is drawn along the surface portion of the shutter curtain 1 by the distance of the shutter curtain 1 while the winding drum 91 and the lock drum 90 rotate.

When the seat plate 4 at the lower end of the lowering shutter curtain 1 comes into contact with an obstacle, the lock device 9 is interlocked with the lower seat plate 41 moving upward relative to the upper seat plate 40. It operates so that the rotation of 90 is restricted. When the lower end of the shutter curtain 1 that is falling under its own weight comes into contact with an obstacle and the lower seat plate 41 moves up relative to the upper seat plate 40, the detection lever 42 moves in conjunction with the upward movement of the lower seat plate 41. It is designed to rotate. Lower end portions of the plurality of detection levers 42 are connected to each other by a wire 43, and one end of the wire 43 is connected to the first rotation lever 92 via a coil spring 98. When the lower seat plate 41 moves up relatively with respect to the upper seat plate 40, the detection lever 42 rotates in a direction away from the lock drum 90 and pulls the wire 43 in a direction away from the lock drum 90. The rotation lever 92 rotates from the first posture to the second posture.

When the first rotation lever 92 rotates in the first direction from the first posture shown in FIG. 16, the first portion 920 of the first rotation lever 92 contacts the contact portion 935 of the second rotation lever 93. By pressing while in contact, the second turning lever 93 in the first position turns together with the first turning lever 92 in the first direction, and the locking portion 934 of the second turning lever 93 is moved. Is locked to the tooth-like locked portion 903 of the lock drum 90 to restrict the rotation of the lock drum 90 (FIG. 17).

On the other hand, as shown in FIG. 16, the third rotation lever 94 in the first posture is brought into contact with the contact portion 936 of the second rotation lever 93 in the first posture, so The rotation is restricted. The second rotating lever 93 in the first posture rotates in the first direction together with the first rotating lever 92, so that the contact portion 936 of the second rotating lever 93 is moved to the third rotating lever 94. At the same time as it gets over the corner portion of the locking portion 941 and locks to the locking portion 941, the third rotation lever 94 rotates downward under its own weight and assumes the second posture (FIG. 17).

When the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 are in the second posture, the second posture of the first rotation lever 92 is held by the pulling force of the wire 43. The second posture of the second turning lever 93 is maintained by the first portion 920 of the first turning lever 92 in the second posture coming into contact with the contact portion 935 of the second turning lever 93. The second posture of the third rotation lever 94 is held by the contact portion 923 of the first rotation lever 92 coming into contact with the contact portion 942 of the third rotation lever 94. Accordingly, when the wire 43 is pulled, that is, in the obstacle detection state, the first rotation lever 92, the second rotation lever 93, and the third rotation lever 94 maintain the second posture and are locked. The device 9 is in a locked state, and the rotation of the lock drum 90 is restricted.

When the rotation of the lock drum 90 is stopped, the withdrawal of the second wire W3 is restricted and the length of the second wire W3 becomes constant. In this state, the upper seat plate 40 (that is, the lock drum 90) is lowered with respect to the lower seat plate 41. Then, the first wire W1 is pulled through the second wire W2 and the relay device 8, and the second operating body 61 slides from the first position to the second position. At this time, the second micro switch MS2 is turned from OFF to ON, and an obstacle detection signal (seat plate operation signal) is transmitted to the obstacle detection control panel 7A. During the electric descent, the driving of the switch 5 is stopped by the obstacle detection control panel 7A and the shutter control panel 7B which have received the obstacle detection signal, and the descent of the shutter curtain 1 is stopped. When the second weight 61 is sliding from the first position to the second position, the first action body 60 at the second position (brake release position) moves in the brake return direction when the weight is falling. Then, the brake release lever 50 is restored and the brake is restored, the rotation of the winding shaft 2 is restricted, and the descent of the shutter curtain 1 is stopped.

Here, in order to return to the brake, the return wires (the first wire W1 and the second wire W2) need to be pulled by a predetermined amount (that is, the shutter curtain 1 needs to be lowered by a predetermined amount) and hit an obstacle. It is desirable that the lower seat plate 41 has an upward movement stroke corresponding to the amount of lowering of the shutter curtain 1 that only causes the brake to return. Further, in addition to the upward movement stroke, it is desirable that the lower seat plate 41 has a margin stroke that allows the upper seat plate 40 to move upward relatively. With this margin stroke, when an obstacle comes into contact with the lower seat plate 41, only the load of the lower seat plate 41 can be applied to the obstacle, and the load of the entire shutter curtain is prevented from acting on the obstacle. . Here, although it is known that the seat plate 4 is configured from the lower seat plate 41 that moves upward relative to the upper seat plate 40, in this embodiment, the movable distance of the lower seat plate 41 relative to the upper seat plate 40. Is larger than the conventional movable distance. Specifically, the relative possible distance of the lower seat plate 41 with respect to the upper seat plate 40 is determined by rotating the detection lever 42 when the lower seat plate 41 at the lower end of the shutter curtain 1 that falls by its own weight hits an obstacle. 2 A first movement amount (for locking) until the rotation lever 93 is locked to the lock drum 90 to restrict the rotation of the lock drum 90 and to restrict the withdrawal of the return wire stored in the winding drum 91. And the upper seat plate 40 is moved downward relative to the lower seat plate 41 in a state where the return wire is restricted from being pulled out. The second movement amount (requires pulling the return wire downward after locking) until the brake is returned by pulling the return wire with the drawer regulated downward, and the shutter car by the brake return Third moving amount of down 1 down to allow the upward movement of the lower seat plate 41 against the upper seat plate 40 after stopping the (alleviate a load that will act on the obstacle), consists of a total of. In connection with the pulling of the return wire, even when the upward movement stroke of the lower seat plate 41 is small, the return wire (for example, the relay device 8) or the return wire (first wire W2) is automatically By providing a mechanism (for example, a link mechanism) that is positioned at a connection portion of the closing device 6 with the operating mechanism and takes out the pulling amount of the operating mechanism (brake release body) that is large with respect to the upward stroke of the second wire W2. The brake can be reset.

When the lower seat plate 41 moves down after the obstacle is removed and the wire 43 is not pulled, the first turning lever 92 in the second posture starts to turn in the second direction by the force of the coil spring 96. To do. As will be described later, in this embodiment, the rotation speed of the first rotation lever 92 in the second direction is reduced. The contact portion 923 at the upper end of the first rotation lever 92 has a concave arcuate surface, and slides with respect to the peripheral surface of the contact portion 942 of the third rotation lever 94 in the initial rotation. The first rotation lever 92 starts to rotate in the second direction, while the second rotation lever 93 maintains the second posture (locked state) (FIG. 18). As can be seen from a comparison between FIG. 17 and FIG. 18, the second posture is within the range of play in the locked state between the contact portion 936 of the second rotating lever 93 and the locking portion 941 of the third rotating lever 94. When the first rotation lever 92 located in the second direction is rotated in the second direction, the second rotation lever 93 is also slightly rotated in the second direction, but the locked state is maintained, and the second rotation The locking portion 934 of the moving lever 93 and the locked portion 903 of the lock drum 90 are in a locked state.

When the first rotation lever 92 rotates a predetermined amount, the contact portion 923 of the first rotation lever 92 abuts against the contact portion 942 of the third rotation lever 94 to act, and the third rotation lever The abutment portion 942 on the tip end side of 94 is pushed upward in conjunction with the turning of the first turning lever 92, and when the third turning lever 94 is pushed up by a predetermined amount, the third turning lever 94 is locked. The engagement state between the portion 941 and the contact portion 936 of the second rotation lever 93 is released (the second rotation lever 93 is kept locked until just before the engagement state is released), and the second The rotating lever 93 is instantaneously rotated in the second direction by the force of the coil spring 97, and the locked state between the locking portion 934 of the second rotating lever 93 and the locked portion 903 of the lock drum 90 is released. And the locked state is released. FIG. 19 shows a state immediately before the lock state is released. When the contact portion 942 of the third rotation lever 94 is completely pushed up by the contact portion 923 of the first rotation lever 92 from the state of FIG. 19, the contact portion 936 of the second rotation lever 92 and the third time The locking state of the moving lever 94 with the locking portion 941 is released, and at the same time, the second rotating lever 93 is instantaneously rotated in the second direction by the coil spring 97, so that the locking portion 934 becomes the lock drum 90. The lock drum 90 can be rotated by being disengaged from the locked portion 903 (FIG. 20).

In the present embodiment, the second wire W <b> 2 is divided into a lock drum 90 and a take-up drum 91 and is taken up. When both a wire winding mechanism and a locking mechanism are provided on one rotating body (although this aspect is also included in the scope of the present invention), the wire is randomly wound around the rotating body and wound in multiple layers. There is a possibility that a so-called winding drawing may occur due to the outer wire biting into the broken wire. When a wire drawing is generated in the wire, there is a possibility of affecting the smooth feeding and winding of the wire. In the present embodiment, the second wire W2 is first wound around the lock drum 90 three times and then wound around the take-up drum 91, and the force that can be generated on the second wire W2 is the lock drum 90. It comes to act on. Here, since the second wire W3 is wound once on the peripheral surface 901 of the lock drum 90 (three windings in parallel), even if a force acts on the second wire W2, the rotating lock drum 90 is rotated. Even if it stops suddenly, the wire is not drawn. Further, by winding a plurality of second wires W2 around the lock drum 90, the second wire W2 is prevented from slipping on the peripheral surface 901 of the lock drum 90, and the lock drum 90 and the take-up drum 91 rotate together. It is like that. The winding drum 91 has a built-in mainspring spring that biases the second wire 3 in the winding direction. Therefore, even if the lock drum 90 is locked and the rotation stops, the second wire W2 is loosened. Does not occur. When the shutter curtain 1 is raised in the locked state, the second wire W2 wound around the lock drum 90 three times is loosened, but the loosened second wire W2 is transferred to the winding drum 91 incorporating the mainspring spring. Since it is wound up, the second wire W2 is not loosened. The touch-up of the shutter curtain 1 at the time of obstacle detection can be performed without waiting for the unlocking delayed by the delay mechanism, and the time from when the shutter curtain 1 stops until the touch-up can be shortened. it can. Further, when the obstacle is detected, the second wire W2 is pulled downward by the frictional force of the second wire W2 wound around the lock drum 90. However, if the obstacle is detected, a large downward direction exceeding the frictional force in the locked state is assumed. When the force is applied, the second wire W2 wound three times around the lock drum 90 slides and lowers the shutter curtain 1, thereby preventing the second wire W2 from being cut.

The lower end of the first rotation lever 92 is connected to the wire 43 via a coil spring 98, and the coil spring 98 constitutes a buffer spring. In order to return to the brake, it is necessary to pull the return wire by a predetermined amount (that is, the shutter curtain 1 needs to be lowered by a predetermined amount), and the lower seat plate 41 hitting the obstacle is engaged with the second rotation lever 93. Even after the stop portion 934 is locked to the tooth-like locked portion 903 of the lock drum 90, it is necessary to move up relatively. At this time, the coil spring 98 is extended, so that the load on the wire 43 and the locking portion (the locking portion 934 and the locked portion 903) accompanying the upward movement of the lower seat plate 41 after the lock drum 90 is locked. Has eased. More specifically, after the lock (after the locking portion 934 is locked to the locked portion 903), the upper seat plate 40 is further moved downward with respect to the lower seat plate 41, so that only the amount moved downward is reached. The return wire is pulled down. At the same time, the lower movement of the upper seat plate 40 causes the detection lever 42 to rotate further upward, and the wire 43 is further pulled. At this time, the coil spring 98 is extended to lock the second rotation lever 93. The portion 934 is prevented from being pressed against the locked portion 903 of the lock drum 90.

It should be noted that the configuration of the locking device 9 described above is one embodiment and does not limit the scope of rights of the present invention. In the illustrated embodiment, the lock drum 90 and the take-up drum 91 are adjacent to each other. However, the lock drum 90 and the take-up drum 91 are separated from each other (as a non-limiting example, the radial dimension to the diameter dimension of these drums) You may arrange. In the present embodiment, the lock drum 90 and the take-up drum 91 are provided separately, and the description has been made based on the configuration in which the lock drum 90 is locked. As described in Japanese Patent No. 13647), the lock drum and the winding drum may be integrated. In the illustrated embodiment, the first rotation lever 92, the second rotation lever 93, the third rotation lever 94, and the detection lever 42 are disposed only on one side of the lock drum 90. And a pair of left and right first rotation levers connected to the wires connected to the respective detection levers may be provided. In the illustrated embodiment, three rotation levers (first rotation lever 92, second rotation lever 93, and third rotation lever 94) are shown, but one rotation lock lever may be provided ( See FIG. 23 and Patent Document 1).

The configuration of the lock device is not limited as long as the lock device regulates the return wire by moving the lower seat plate 41 upward. For example, the locking device may not include a winding drum. That is, the winding drum may be provided at a location different from the locking device (for example, a portion of the seat plate that is separated from the locking device, an upper portion of the opening such as a lintel, or the inside of the guide rail). An aspect in which the winding drum is provided in the lintel portion is disclosed in Patent Document 1, for example. Further, the return wire is not necessarily limited to the one wound around the winding drum, and for example, the lower end side of the return wire may be guided inside the guide rail by a pulley, and the lower end may be fixed to the floor surface or the guide rail. . The locking device is not necessarily limited to the one provided with the lock drum, and for example, the drawing of the return wire may be mechanically restricted by the clamping means or the pressing means. The locking device is not necessarily limited to one in which all the components are provided on the upper seat plate, and includes a mode in which some of the components of the locking device are provided on the lower seat plate.

[F] Self-weight re-lowering delay mechanism As described above, after the obstacle is removed, the lower seat plate 41 moves downward relative to the upper seat plate 40, so that the lock device 9 is in an unlocked state. The return wire (first wire W1 + second wire W2) can be pulled out, the brake of the opening / closing machine 5 is released by the operation mechanism of the automatic closing device 6, and the shutter curtain 1 is lowered again by its own weight. Here, the movable lock portion (for example, the first rotation lever 92, the movable lock member 92 ′ shown in FIG. 23) of the lock device 9 and the displacement of the detection lever 42 from the second posture to the first posture are resisted. By providing the damping mechanism so as to give, the speed of the movable lock portion in the second posture which is the lock posture is reduced and rotated to the first posture, and the return wire (the first wire W1, the second wire). The timing for releasing the wire W2) pull-out restriction is delayed. In other words, by delaying the timing at which the locking device 9 in the locked state is unlocked, the return wires (the first wire W1 and the second wire W2) can be pulled out, so that the shutter curtain 1 is self-weighted after the obstacle is removed. The time until re-descent starts is delayed. A specific configuration example will be described below.

[F-1] First Embodiment In this embodiment, the second rotation lever 93 is rotated in the second direction instantly by delaying the rotation start timing of the second rotation lever 93 in the second direction and by the action of the coil spring 97. It is characterized by releasing the lock state by moving. By reducing the rotation speed of the first rotation lever 92 in the second direction, it is possible to further increase the time until the locked state is released after the obstacle is detected. That is, a damping mechanism is provided so as to reduce the speed at which the first rotation lever 92 in the second posture rotates in the second direction, and after removing the obstacle, the first rotation lever 92 is moved in the second direction. , The timing of releasing the rotation restriction of the second rotation lever 93 by the third rotation lever 94 is delayed, and the second rotation lever 93 released from the rotation restriction is a damping mechanism. Without being affected by the coil spring 97, the coil spring 97 instantaneously rotates in the second direction, and the locked state is quickly released.

An embodiment of the slow down device 44 as a damping mechanism is shown in FIGS. The slow descending device 44 is configured so that the lower seat plate 41 moved upward relative to the upper seat plate 40 when the bottom surface portion 410 of the lower seat plate 41 hits the obstacle is lowered again with respect to the upper seat plate 40 after the obstacle is removed. This is a device for slowly lowering the lower seat plate 41 when moving. The slow descending device 44 includes a rotary damper 440 and a pinion gear 441 provided on the upper seat plate 40, a rack gear 442, an elevating body 442A provided so as to move up and down integrally with the lower seat plate 41, a pinion gear 441 and a rack gear. And a one-way clutch mechanism provided between 442 and 442.

The one-way clutch mechanism meshes with the pinion gear 441 and rotates with the pinion gear 441 and rotates with the rack gear 442 and rotates with the rack gear 442 in the vertical direction. And a one-way clutch 448 provided between the first gear 446 and the second gear 447.

The one-way clutch 448 is configured such that the rotation of the second gear 447 in the first direction is not transmitted to the first gear 446, and the second gear 447 rotates integrally with the first gear 446 only when rotating in the second direction. Operates on. When the elevating body 442A moves up, the second gear 447 rotates in the first direction, so that the elevating body 442A can move up quickly without receiving resistance. When the lifting body 442A moves downward, the second gear 447 rotates in the second direction, the first gear 446 rotates integrally with the second gear 447, and the first gear 446 includes a pinion having a rotary damper 440. Since the second gear 447 is engaged with the gear 441, the second gear 447 rotates slowly while receiving the resistance of the rotary damper 440. Therefore, the elevating body 442A can slowly move down.

Further, since the pinion gear 441 meshes with the first gear 446 having a large diameter with respect to the pinion gear 441, the rotation speed of the first gear 446 is higher than that of the pinion gear 441 and the first gear 441. Compared to the case where the gear 446 is decelerated by the gear ratio and the rotation speed of the second gear 447 that rotates together with the first gear 446 is also reduced, and the pinion gear 441 and the rack gear 442 are directly meshed with each other. 442A can be slowly moved down. Further, since the first gear 446 having a large diameter and the second gear 447 having a small diameter rotate integrally, and the second gear 447 having a small diameter meshes with the rack gear 442, the first gear 446 meshes directly with the rack gear 442. As compared with the case where it is assumed that the lift body 442A is moved downward by the same distance, more rotation is required, and the lift body 442A is slowly lowered by the number of teeth ratio of the first gear 446 and the second gear 447. Can be moved.

A box-like case 449 is fixed inside the upper seat plate 40, and a rotary damper 440, a pinion gear 441, and a one-way clutch mechanism are attached to the case 449. The case 449 includes an upper surface portion 4490, a first side surface portion 4491, a second side surface portion 4492, a first surface portion 4493, and a second surface portion 4494, and the lower side is open. The lower end of the first side surface portion 4491 extends below the lower end of the second side surface portion 4492. An insertion hole 4491 a for the wire 43 is formed in a lower portion of the first side surface portion 4491. The case 449 is mounted on the lower surface of the upper surface portion 400 of the upper seat plate 40 via the upper surface portion 4490 with the first side surface portion 4491 positioned on the side far from the locking device 9 and the second side surface portion 4492 positioned on the near side. Yes. Note that the case 449 may be attached in the opposite direction. A rotary damper 440 and a pinion gear 441 are attached to the first surface portion 4493. Between the first surface portion 4493 and the second surface portion 4494, the shaft portion of the one-way clutch mechanism (first gear 446, second gear 447) is bridged.

As shown in FIG. 21A, the elevating body 442A is composed of a vertical plate-like main body, and the main body is parallel to the first side surface portion 4491 and the second side surface portion 4492 of the case 449 in the plan view, and the first surface portion 4493. The second surface portion 4494 extends perpendicular to the second surface portion 4494. A columnar horizontal portion is formed at the lower end of the main body, and both end portions 4420 of the horizontal portion are both end portions in the width direction of the main body of the lifting body 442A, and the first side surface portion 4493 and the second side surface portion of the case 449. Projecting beyond 4494. As shown in FIG. 22, the lower seat plate 41 extends horizontally so as to be separated from the left and right side surface portions 413 hanging from the left and right horizontal contact pieces 411 at the upper end and the lower ends of the left and right side surface portions 413. Left and right horizontal portions 414, and a lower portion between the horizontal portion 414 and the bottom surface portion 410 is a wide space 415. The cylindrical horizontal portion at the lower end of the lifting body 442A is accommodated in the wide space 415, and both end portions 4420 of the horizontal portion are in contact with the horizontal portion 414 of the lower seat plate 41 from below. The elevating body 442A moves up and down along with the up and down movement.

The main body of the vertical plate-like lifting body 442A includes a first surface that faces the one-way clutch mechanism, and a second surface that faces the inner surface of the first side surface portion 4491. The first surface includes the first surface. A rack gear 442 is formed in the height direction at a portion close to one side in the width direction, and the rack gear 442 meshes with the second gear 447. On the other side in the width direction, the main body is formed with a vertically long insertion hole 4421 for inserting the wire 43 in the height direction. On the first surface of the main body, a protruding portion 4422 is projected in the height direction adjacent to the vertically long insertion hole 4421 and formed on the inner surface of the first surface portion 4493 of the case 449 in the height direction. The guide protrusion 4493a is in sliding contact. The second surface of the main body is in sliding contact with the inner surface of the first side surface portion 4491 of the case 449. The elevating body 442A is configured such that the rack gear 422 meshes with the second gear 447, the raised portion 4422 is in sliding contact with the guide protrusion 4493a, and the second surface of the main body is in sliding contact with the inner surface of the first side surface portion 4491. The case 4490 fixed to the head is raised and lowered. The sliding contact state here provides a vertical guide function of the lifting body 442A to the extent that resistance is not given to the lifting operation of the lifting body 442A. As shown in FIG. 21B, the upper surface portion 4490 of the case 449 is formed with a downward opening-shaped concave portion 4490a, and the lower seat plate 41 moves up and down with respect to the upper seat plate 40. The upper end portion of the body 442A is positioned in the recess 4490a. In this way, the lowered lifting body 442A can be maintained at a higher position, and the rack gear 422 and the second gear 447 of the lifting body 442A can be maintained in a state where the lower seat plate 41 is moved downward relative to the upper seat plate 40. Are sufficiently meshed so that the initial movement when the lower seat plate 41 is moved upward can be performed smoothly.

When the lower seat plate 4 (in the state shown in FIG. 22) at the lower end of the lowering shutter curtain comes into contact with an obstacle, the lower seat plate 41 moves upward relative to the upper seat plate 40 and moves up and down. The second gear 447 rotates in the first direction in conjunction with the upward movement of the body 442A, but the rotation of the second gear 447 in the first direction is not transmitted to the first gear 446 by the one-way clutch 448, The first gear 447 rotates freely. Accordingly, the lower seat plate 41 moves up instantaneously with respect to the upper seat plate 40. At this time, when the detection lever 42 is rotated and the wire 43 is pulled, the first rotation lever 92 is rotated in the first direction, and the second rotation lever 93 is simultaneously rotated in the first direction. Then, the locking portion 934 is locked to the locked portion 903 of the lock drum 90 and restricts the rotation of the lock drum 90.

On the other hand, when an obstacle below the lower seat plate 41 is removed in a state where the lower seat plate 41 is moved upward with respect to the upper seat plate 40, the lower seat plate 41 starts to move downward under its own weight, and the lifting body 442A The second gear 447 rotates in the second direction in conjunction with the downward movement, but the rotation of the second gear 447 in the second direction is transmitted to the first gear 446 by the one-way clutch 448, and further the first gear 446. Is transmitted to the pinion gear 441, and the pinion gear 441 rotates slowly by the operation of the rotary damper 440. Further, since the pinion gear 441 meshes with the first gear 446 having a large diameter with respect to the pinion gear 441, the rotation speed of the first gear 446 is higher than that of the pinion gear 441 and the first gear 441. The speed is reduced by the gear ratio of the gear 446, the rotational speed of the second gear 447 that rotates integrally with the first gear 446 is also reduced, and the elevating body 442A and the lower seat plate 41 slowly move downward. Further, since the first gear 446 having a large diameter and the second gear 447 having a small diameter rotate integrally, and the second gear 447 having a small diameter meshes with the rack gear 442, the first gear 446 meshes directly with the rack gear 442. As compared with the case where it is assumed that the lift body 442A is moved downward by the same distance, more rotation is required, and the lift body 442A and the lower seat plate 41 have the teeth of the first gear 446 and the second gear 447. Slow down a few minutes. When the lower seat plate 41 slowly moves down, the first rotation lever 92 in the second posture returns while rotating slowly, and the third rotation lever 94 rotates the second rotation lever 93. Delay the timing of deregulation.

[F-2] Second Embodiment Another embodiment of the delay mechanism is shown in FIG. In FIG. 23, it should be noted that the structure of the rotation lock member is different from that shown in FIGS. Moreover, the structure shown in FIG. 14 can be employ | adopted for the structure of the seat board 4 provided with the obstacle detection means except the point which is not provided with the slow-down apparatus 44 as a delay mechanism. The damping mechanism includes a rotary damper 440 ′ and a rack 441 ′. As shown in FIG. 23, one end of a coil spring 98 is connected to the lower end of a rotation lock member 92 ′ that rotates about a rotation fulcrum 920 ′, and the other end of the coil spring 98 is connected to one end of a rack 441 ′. The other end of the rack 441 ′ is connected to the end of the wire 43. The rotary damper 440 ′ is attached to the extension portion 9530 of the rear plate 953. On the other end side of the rack 441 ′, there is a portion where the rack gear 441A ′ is not formed (non-gear forming portion). When the rotation lock member 92 ′ is in the unlocked position, the pinion gear 440A ′ is positioned at the non-gear forming portion on the other end side of the rack 441 ′. When not in contact with an obstacle, the pinion gear 440A ′ and the rack gear 441A ′ are not meshed.

When the lower end of the shutter curtain 1 that is falling under its own weight comes into contact with an obstacle, the wire 43 is pulled leftward. The rack 441 ′ and the coil spring 98 are pulled to the left as they are, the coil spring 99 is extended, the rotation lock member 92 ′ is rotated clockwise, and the locking claw 921 ′ is hooked on the locked portion 903 to be locked. Stop the rotation of the drum 90. Further, when the rotation lock member 92 ′ moves slightly, the engagement claw 921 ′ and the engaged portion 903 are completely engaged with each other, and the rotation lock member 92 ′ does not rotate any more and stops. In the operation so far, the rack gear 441A ′ and the pinion gear 440A ′ are not meshed with each other and operate in a state that is not related to the damper. Thereafter, when the lower seat plate 41 further moves upward, the coil spring 98 extends (because the rotation lock member 92 ′ does not move), and the rack 441 is now engaged with the pinion gear 440A ′ and the rack gear 441A ′. ′ Moves to the left (by a distance corresponding to the distance the lower seat plate has moved relatively upward). When the obstacle is removed, the wire 43 returns to the right, the coil spring 98 contracts, and the rack 441 ′ returns to the right. At this time, the damping mechanism is activated, and the rack 441 ′ is connected to the one-way rotary damper 440 ′. The action will slowly return to the right. When the coil spring 98 has fully returned, the rotation lock member 92 ′ starts to rotate counterclockwise. At this time, since the rack gear 441A ′ and the pinion gear 440A ′ are not engaged with each other, the rotation lock member 92 ′ is not affected by the damping mechanism and quickly performs the unlocking operation.

A rack gear 441A ′ provided over the entire length of the rack 441 ′ (the rack gear 441A ′ and the rack 441 ′ are always meshed) can also be implemented. Moreover, the aspect of the damping mechanism is not limited to that shown in FIG. 23. For example, a one-way rotary damper (not shown) may be provided at the shaft portion of the rotation fulcrum 920 ′ of the rotation lock member 92 ′.

[F-3] Third Embodiment The locking device 9 will be described on the premise of the rotation locking member 92 'of the second embodiment. A third embodiment of the delay mechanism will be described with reference to FIGS. 24, 25, and 26. FIG. In each figure, (A) is a state in which the lower seat plate 41 is freely suspended from the upper seat plate 40, and (B) is a state in which the lower seat plate 41 is relative to the upper seat plate 40 from the state of (A). Shows the uplifted state. In the third embodiment, the damping mechanism 45 is provided so as to give resistance to the displacement of the detection lever 42 from the second position to the first position.

In the aspect shown in FIG. 24, the damping mechanism 45 is incorporated in the shaft portion of the rotation fulcrum 421 of the detection lever 42. The damping mechanism 45 includes a one-way rotary damper 450, and when the detection lever 42 in the first posture rotates to the second posture (clockwise in the illustrated example), the detection lever 42 can freely rotate. When the detection lever 42 in the second posture rotates to the first posture (counterclockwise in the illustrated example), resistance is given to the rotation of the detection lever 42. .

The lower seat plate 41 at the lower end of the shutter curtain under its own weight is in the state shown in FIG. 24A. When the lower seat plate 41 hits an obstacle, the lower seat plate 41 is moved to the first posture in conjunction with the upward movement of the lower seat plate 41. A certain detection lever 42 is pushed up, and the wire 43 is pulled in the first direction (the arrow direction in FIG. 24A), and the second posture shown in FIG. At this time, since the one-way rotary damper 450 rotates idly, the rotary damper 450 does not prevent the detection lever 42 from rotating from the first posture to the second posture, and interlocks with the rotation of the detection lever 42. Then, the wire 43 is pulled in the first direction, and the rotation lock member 92 ′ is rotated from the first posture to the second posture to be locked.

After the obstacle is removed, the lower seat plate 41 is moved downward relative to the upper seat plate 40, so that the detection lever 42 in the second posture can be rotated to the first posture. The lever 42 eliminates the force of pulling the wire 43 in the first direction, and the coil spring 99 causes the rotation lock member 92 ′ in the second position to rotate to the first position. At this time, the detection lever 42 in the second position rotates to the first position via the wire 43 pulled in the second direction (the arrow direction in FIG. 24B), but the rotary damper 450 Is a one-way damper that provides resistance to rotation of the detection lever 42 from the second position to the first position. The detection lever 42 receives resistance of the damping mechanism 45 including the rotary damper 450, so Then, the rotation lock member 92 connected to the detection lever 42 moves slowly from the second posture to the first posture while receiving the resistance of the damping mechanism 45, and the lock device 9 enters the unlocked state. The lock device 9 is unlocked and the return wires (the first wire W1 and the second wire W2) can be pulled out, the brake is released, and the shutter curtain 1 is lowered again by its own weight. In this way, the shutter curtain 1 that has been stopped after the obstacle has been removed is lowered again by delaying the timing of releasing the restriction of the return wires (the first wire W2 and the second wire W3) by the lock device 9. The time to do is delayed.

In the aspect shown in FIG. 25, the damping mechanism 45 includes a rotary damper 450 having a pinion gear 450A, and a gear 451 that is formed at a predetermined portion on the periphery of the detection lever 42 and meshes with the pinion gear 450A. The rotary damper 450 is provided on the support portion 42A of the detection lever 42 by selecting a position where the pinion gear 450A meshes with the gear 451 of the detection lever 42. The rotary damper 450 is one-way, and when the detection lever 42 in the first posture rotates to the second posture (clockwise in the illustrated example), the detection lever 42 is allowed to freely rotate, When the detection lever 42 in the second posture rotates to the first posture (counterclockwise in the illustrated example), resistance is given to the rotation of the detection lever 42. The description of FIG. 24 can be used for the operation of the damping mechanism 45 of FIG.

In the aspect shown in FIG. 26, a damping mechanism 45 is provided on the support portion 42 </ b> A of the detection lever 42. The damping mechanism 45 includes a linear motion damper 452 provided with an extendable pressing body 452A. As shown in FIG. 26 (A), when the detection lever 42 is in the first posture, the pressing body 452A is in the telescopic posture, and as shown in FIG. 26 (B), the detection lever 42 is in the second posture. At some point, the pressing body 452A is in the extended posture. The linear damper 452 is configured to generate a resistance force when the pressing body 452A contracts, and automatically expands and recovers, and when the detection lever 42 rotates from the first posture to the second posture. When the detection lever 42 is rotated from the second posture to the first posture (clockwise in the example shown), the detection lever 42 is allowed to freely rotate (clockwise in the illustrated example). In addition, the pressing body 452A abuts against a predetermined portion on the periphery of the detection lever 42 and contracts while pressing the predetermined portion, thereby giving resistance to the rotation of the detection lever 42. The description of FIG. 24 can be used for the operation of the damping mechanism 45 of FIG.

[F-4] Fourth Embodiment Another embodiment of the dead weight re-falling delay mechanism will be described with reference to FIGS. The self-weight re-lowering delay mechanism is built in the automatic closing device 6 integrated with the operating mechanism. The basic configuration and basic operation of the automatic closing device 6 are the same as those shown in FIGS. 9 to 13. The same reference numerals are assigned to the same elements, and FIGS. The description relating to can be incorporated. 27 to 32, the first micro switch MS1, the second micro switch MS2, and the third micro switch MS3 are not shown. The casing of the automatic closing device 6 is directly attached to the opening / closing machine 5, and as shown in FIG. 27, in the casing, there are a first operating body (first slide piece) 60, a second operating body (second slide piece). ) 61, a third operating body (third slide piece) 62, a first latch lever 63, a solenoid 64, a second latch lever 65, a rack gear 66, a pinion gear 67, and a cam 68 formed on the second operating body 61. It is provided. The second latch lever 65 is movable in the left-right direction in the drawing (a direction orthogonal to the moving direction of the first operating body 60) along a guide (not shown), and is moved to the right side (the first operating body 60 by a coil spring 650). (Direction approaching). The first operating body 60 is provided so as to be capable of reciprocating on the shaft, and includes a large diameter portion 60A. The large diameter portion 60A forms an abutting portion against which the brake release lever 50 is pressed. The first operating body 60 is biased by a coil spring 601 in a direction to release the brake release lever 50, and is pressed by the coil spring 601 to press the brake release lever 50 of the switch 50 to release the brake. (See FIG. 28). Normally, the first latch lever 63 is locked to the large diameter portion 60A of the first operating body 60, so that the first operating body 60 is held in a state where the large diameter portion 60A is separated from the brake release lever 50. . The large diameter portion 60 </ b> A of the first operating body 60 also functions as a locked portion with the first latch lever 63 and the second latch lever 65 and a contact portion with the second operating body 61.

As shown in FIG. 29, when the fire detection signal is input, the solenoid 64 is activated by the fire detection signal (24V signal) from the disaster prevention panel, and the first latch lever 63 is tilted by being pulled by the solenoid 64 ( 1) The first latch lever 63 and the first operating body 60 are disengaged from each other (2). The first operating body 60 is pushed by the coil spring 601 and moves on the shaft, so that the brake release lever 50 is moved. Press to release the brake (3). At this time, the first micro switch MS1 and the third micro switch MS3 are turned from OFF to ON. An operation confirmation signal is transmitted to the obstacle detection control panel 7A by detection of the first micro switch MS1, and transmission of a fire detection signal from the disaster prevention panel 6b to the automatic closing device 6 is blocked by detection of the third micro switch MS3. The

As shown in FIG. 30, when the third wire W3 is loosened by the operation from the manual closing device (1), the third operating body 62 and the first latch lever 63 held by the third wire W3 are moved to the coil spring 621. When the first latch lever 63 that is pushed and slides along the axis (2) and the movement of the first actuating body 60 is slid, the first actuating body 60 is pushed by the coil spring 601 and the shaft The brake is released by moving upward and pressing the brake release lever 50 (3). At this time, the first micro switch MS1 and the third micro switch MS3 are turned from OFF to ON. An operation confirmation signal is transmitted to the obstacle detection control panel 7A by the detection of the first micro switch MS1.

The operation when the shutter curtain while falling under its own weight hits an obstacle will be described with reference to FIG. As described in the above-described embodiment, when the seat plate at the lower end of the shutter curtain hits the obstacle, the return wire (first wire W1) is pulled. When the first wire W1 is pulled (1), the stepped portion 61A of the second operating body 61 slides on the shaft while abutting against the large diameter portion 60A of the first operating body 60 to push back the first operating body 60 ( 2) The first operating body 60 moves away from the brake release lever 50, and the brake returns. When energized, the second micro switch MS2 is turned from ON to OFF by the sliding movement of the second operating body 61 in the brake return direction, and an obstacle detection signal is transmitted to the obstacle detection control panel 7A. In conjunction with the movement of the second operating body 61, the pinion gear 67 meshing with the rack gear 66 rotates, and the cam 68 integrated with the pinion gear 67 rotates counterclockwise (3). The rotation of the cam 68 causes the second latch lever 65 that is in contact with the cam 68 to slide to the right (in the direction approaching the first operating body 60) by the urging force of the coil spring 650, and the large diameter portion of the first operating body 60 The position of the first actuating body 60 is maintained by engaging with 60A (4).

When the obstacle is removed, the return wire (first wire W1) is loosened and pushed by the coil spring 611, and the second operating body 61 starts to return. At this time, the step portion 61A of the second operating body 61 moves away from the large diameter portion 60A of the first operating body 60, but the second latch lever 65 and the large diameter portion 60A of the first operating body 60 are locked. The state is maintained for a predetermined time. Specifically, the rack gear 66 returns while giving a clockwise rotation to the pinion gear 67, but the clockwise rotation of the pinion gear 67 has no resistance when the one-way rotary damper 69 (the first wire W1 is pulled). ). The cam 68 integrated with the pinion gear 67 also slowly rotates clockwise, and the second latch lever 65 slowly slides to the left (in the direction away from the first operating body 60) against the biasing force of the coil spring 650. . When the second latch lever 65 slowly slides to the left, the second latch lever 65 and the first operating body 60 are released from the locked state after a predetermined time has elapsed, and the first operating body 60 is pushed again by the coil spring 601. The brake curtain is released by moving on the shaft and pressing the brake release lever 50, and the shutter curtain is lowered again.

Thus, the automatic closing device 6 includes a means (second latch lever 65) for restricting the movement of the brake release body (first actuating body 60) at the brake return position, and the brake release body (first for which movement is restricted). Means for releasing the restriction of the operating body 60) (cam 68, pinion gear 67, rack gear 66, coil spring 611), and means for delaying the timing of releasing the movement restriction (rotary damper 69). The movement restriction of the brake release body (first actuating body 60) is delayed at a predetermined time after the withdrawal restriction by the return wire withdrawal restricting means is released and the return wire (first wire W1 + second wire W2) is loosened. Is released, and the brake release body (first operating body 60) is instantaneously brought to the brake release position by the biasing means (coil spring 601). Dynamic and performs brake release by pressing the brake release lever 50 of the driving device 5.

As described above, the specific configuration of the shutter with a mechanical evacuation stop device has been described in detail with reference to the drawings, but these descriptions are merely examples of an electric shutter with a mechanical evacuation stop device, The configuration of the present invention described in the claims is not limited.

DESCRIPTION OF SYMBOLS 1 Shutter curtain 2 Winding shaft 3 Guide rail 4 Seat plate 40 Upper seat plate 41 Lower seat plate 5 Opening and closing machine 6 Automatic closing device 60 1st action body 61 2nd action body 62 3rd action body 7A Obstacle detection control panel 7B Shutter control panel 8 Relay device 9 Lock device 10 Manual closing device W1 First wire W2 Second wire W3 Third wire MS1 First micro switch (first detection means)
MS2 Second micro switch (second detection means)
MS3 3rd micro switch

Claims (7)

Shutter curtains,
An opening and closing machine that electrically opens and closes the shutter curtain to open and close the opening;
An automatic closing device that releases the brake by the operating mechanism in the event of a fire and lowers the shutter curtain by its own weight;
A seat plate provided at the lower end of the shutter curtain and comprising an upper seat plate and a lower seat plate that is movable relative to the upper seat plate;
A return string-like member connected to the operating mechanism and configured to be pulled out as the shutter curtain descends;
A lock device that mechanically restricts the withdrawal of the return string member by lowering the lower seat plate of the shutter curtain being hit against an obstacle and moving upward relative to the upper seat plate;
First detection means for detecting a pull of the return string-like member whose withdrawal is restricted and accompanying the descent of the shutter curtain, and outputting an obstacle detection signal to the control unit;
A delay mechanism that delays the timing of re-falling the weight of the shutter curtain after obstacle removal,
With
When the lower seat plate of the shutter curtain during electric lowering hits an obstacle, the control unit receives the obstacle detection signal from the first detection means, and stops the electric lowering of the shutter curtain,
When the lower seat plate of the shutter curtain that is falling under its own weight hits an obstacle, the brake is returned by pulling the shutter string of the return string member that is controlled to be pulled out, and the weight of the shutter curtain is lowered. Stop,
The delay mechanism includes a holding unit that holds the brake return posture of the operating mechanism in the brake return posture after removing the obstacle for a predetermined time, and the pull-out restriction of the return string member is released after the obstacle removal. Although the shutter curtain re-falls its own weight, the holding means delays the timing of re-falling its own weight by holding the brake return posture of the operating mechanism for a predetermined time.
Electric shutter with mechanical evacuation stop device. The operating mechanism includes a brake release body that is biased in a brake release direction by a biasing means,
At the time of obstacle detection, the brake release body is in the brake return position,
The holding means regulates the movement of the brake release body at the brake return position after removing the obstacle, holds the brake release body at the brake return position for a predetermined time,
After removal of the obstacle, the brake return position of the brake release body is held for a predetermined time by the holding means, and when the holding means is released, the brake release body is instantaneously moved to the brake release position by the biasing means.
The electric shutter with a mechanical evacuation stop device according to claim 1. The operating mechanism is provided with second detecting means for detecting that the operating mechanism is in a brake release posture and outputting an operation confirmation signal to the control unit,
When the operation confirmation signal is input to the control unit, the control mode is changed from the electric open / close mode to the self-weight drop mode.
The electric shutter with a mechanical evacuation stop device according to claim 1. The operating mechanism is:
A first actuating body that is a brake release body biased in a first direction;
A second actuator that is biased in the first direction and moves in the second direction by pulling the return string member when an obstacle is detected;
With
When the brake is released by the automatic closing device, only the first operating body moves in the first direction and the operation confirmation signal is output,
At the time of obstacle detection at the time of falling by its own weight, the first operating body moves to the brake return position together with the second operating body moving in the second direction,
The first detection means is provided in the operating mechanism, and the first detection means detects the movement of the second operating body in the second direction and outputs an obstacle detection signal during electric lowering. ,
The electric shutter with a mechanical evacuation stop device according to claim 3. The delay mechanism is located on the seat plate;
The delay mechanism delays the timing of releasing the restriction of the return string-like member after removing the obstacle, thereby holding the brake return posture of the operating mechanism for a predetermined time and delaying the timing of re-falling its own weight. is there,
The electric shutter with a mechanical evacuation stop device according to any one of claims 1 to 4. The locking device is
A winding mechanism provided on the seat plate and winding the return string member;
A lock portion that regulates the rotation of the rotating body of the winding mechanism in conjunction with the relative upward movement of the lower seat plate;
With
The delay mechanism reduces the lowering speed of the lower seat plate in the upper movement position after removing the obstacle.
The shutter with a mechanical evacuation stop device according to claim 5. The locking device is
A winding mechanism provided on the seat plate and winding the return string member;
A movable lock portion for restricting rotation of the rotating body of the winding mechanism by displacing from the first posture to the second posture in conjunction with the relative upward movement of the lower seat plate;
With
The delay mechanism reduces the return speed of the movable lock portion in the second posture to the first posture after the obstacle removal,
The shutter with a mechanical evacuation stop device according to claim 5.